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Phys Scie II- Final Exam Review (Exam 4, Exam 1, & Exam 2)

Beschreibung

Physical Science II-Exams 1-4
Emelina Solorzano
Quiz von Emelina Solorzano, aktualisiert more than 1 year ago
Emelina Solorzano
Erstellt von Emelina Solorzano vor etwa 8 Jahre
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Zusammenfassung der Ressource

Frage 1

Frage
The first minerals to crystallize are those with the
Antworten
  • lower melting point
  • higher melting point

Frage 2

Frage
The last minerals to crystallize from a cooling magma have a
Antworten
  • low melting point and a high silica content
  • low melting point and a low silica content
  • high melting point and a low silica content
  • high melting point and a high silica content

Frage 3

Frage
The protective shells that many sea organisms grow are not minerals because they
Antworten
  • become compacted.
  • are organic.
  • are made of ooze.
  • are not calcium carbonate.

Frage 4

Frage
The silicates are the largest mineral group because silicon and oxygen are
Antworten
  • found in the common mineral quartz.
  • the two most abundant elements in Earth's crust.
  • the hardest elements on Earth's surface.

Frage 5

Frage
Minerals are formed by the process of
Antworten
  • magma differentiation.
  • crystallization.
  • partial melting.
  • silica enrichment.

Frage 6

Frage
The first minerals to crystallize from a cooling magma have a
Antworten
  • low melting point and a high silica content.
  • high melting point and a low silica content.
  • high melting point and a high silica content.
  • low melting point and a low silica content.

Frage 7

Frage
Minerals are composed of
Antworten
  • homogenous solids.
  • inorganic solids.
  • silicon compounds.
  • common types of rocks.

Frage 8

Frage
The melting point of silicate minerals is strongly dependent on the amount of silica it contains. The first minerals to melt are those with
Antworten
  • lowest melting point and lowest silica content.
  • highest silica content and highest melting point.
  • lowest melting point and highest silica content.
  • lowest silica content and highest melting point.

Frage 9

Frage
The most common mineral in Earth's crust is ________, and the second most common mineral is ________.
Antworten
  • olivine, feldspar
  • silicate, carbonate
  • quartz, feldspar
  • feldspar, quartz

Frage 10

Frage
The last minerals to crystallize from a cooling magma have the
Antworten
  • highest melting point and the highest percentage of silica.
  • lowest melting point and the lowest percentage of silica.
  • highest melting point and the lowest percentage of silica.
  • lowest melting point and the highest percentage of silica.

Frage 11

Frage
Silica has a relatively
Antworten
  • high melting point.
  • low melting point.

Frage 12

Frage
The Mohorovicic discontinuity occurs because of a
Antworten
  • density change in rocks of the same composition on both sides of the boundary.
  • change in temperature with depth.
  • change in the composition of rocks on both sides of the boundary.
  • shift in the density of minerals with the same composition.

Frage 13

Frage
In comparison to P-waves, S-waves
Antworten
  • can travel through all mediums–solid granite, magma, water and/or air.
  • can travel only through solids—not in fluids.
  • compress and expand the rock as they move through it.
  • are fast and the first to register on a seismograph.

Frage 14

Frage
The Earth's magnetic field is attributed to the
Antworten
  • flow of molten fluid in Earth's outer core.
  • flow of molten liquid in Earth's inner core.
  • movement of lithospheric plates in the outer mantle.
  • movement of lithospheric plates at Earth's surface.

Frage 15

Frage
The asthenosphere is part of the
Antworten
  • lithosphere.
  • crust.
  • mantle.
  • outer core.

Frage 16

Frage
The speed of a seismic wave depends on
Antworten
  • its frequency.
  • the type of material it travels through.
  • its amplitude.
  • how far it has to travel.

Frage 17

Frage
Which seismic waves produce a wave shadow?
Antworten
  • Love waves.
  • S-waves.
  • P- and S- waves
  • P-waves.

Frage 18

Frage
The Mohorovicic discontinuity marks the change in rock density elasticity between the
Antworten
  • inner and outer core.
  • asthenosphere and lithosphere.
  • core and the mantle.
  • mantle and the crustal surface.

Frage 19

Frage
The Earth's layer with plastic-like behavior is the
Antworten
  • mantle.
  • inner core.
  • crust.
  • outer core.

Frage 20

Frage
The lithosphere includes
Antworten
  • continental and oceanic crust and the upper part of the mantle.
  • continental and oceanic crust.
  • the crust and the upper part of the mantle.
  • part of the mantle and the crust.

Frage 21

Frage
The thickness of Earth's crust
Antworten
  • varies from 10 km under the oceans to 60 km under the continents.
  • on average is about 10 km.
  • varies from 10 km under the continents to 60 km under the oceans.
  • on average is about 60 km.

Frage 22

Frage
P-waves travel faster through the inner core than the outer core because the inner core is
Antworten
  • solid.
  • the same as the outer core.
  • hotter than the outer core.
  • rock.

Frage 23

Frage
The outer core is
Antworten
  • liquid.
  • the source for volcanoes.
  • plastic.
  • rock.

Frage 24

Frage
Seismic waves are classified as body waves and surface waves. An example of a body wave is a
Antworten
  • Rayleigh wave.
  • Tertiary wave (T-wave).
  • Love wave.
  • Primary wave (P-wave).

Frage 25

Frage
In comparison to S-waves, P-waves
Antworten
  • are the second seismic wave to register on a seismograph.
  • can travel only through solids, not through fluids.
  • can travel through solid granite, magma, water and/or air.
  • vibrate the particles of their medium up and down and side-to-side.

Frage 26

Frage
The outer core
Antworten
  • transmits S-waves.
  • flows fast enough to power Earth's magnetic field.
  • has a plasticlike flow.
  • is solid as a rock.

Frage 27

Frage
Because S-waves do not travel through Earth's outer core, scientists inferred that the outer core is
Antworten
  • impenetrable.
  • molten liquid.
  • very dense.
  • solid.

Frage 28

Frage
Continental crust is
Antworten
  • more dense than oceanic crust.
  • thinner than oceanic crust.
  • thinner and more dense than oceanic crust.
  • less dense than oceanic crust.

Frage 29

Frage
Water able to be contained in the subsurface depends on
Antworten
  • permeability.
  • chemical composition.
  • porosity.
  • none of these

Frage 30

Frage
The greater the hydraulic gradient the
Antworten
  • greater the porosity.
  • less the permeability.
  • faster the flow.
  • slower the flow.

Frage 31

Frage
A rock's permeability can be described by its
Antworten
  • water-transmitting capability, or hydraulic conductivity.
  • water-holding capacity.
  • depth of burial.
  • density.

Frage 32

Frage
When subsurface ground material is completely saturated with water, we call it
Antworten
  • the saturated zone.
  • the water table.
  • groundwater.
  • groundwater in the saturated zone.

Frage 33

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Water is vital to life on our planet. Most of Earth's water supply is in the
Antworten
  • ground.
  • oceans.
  • rivers, lakes, and streams.
  • ice caps.

Frage 34

Frage
The flow of groundwater depends on
Antworten
  • porosity and hydraulic gradient.
  • permeability and gravity.
  • porosity only.
  • permeability and porosity.

Frage 35

Frage
A rock with a high porosity will most likely have a
Antworten
  • low density.
  • large proportion of open pore spaces.
  • low permeability.
  • high permeability.

Frage 36

Frage
The capacity a material has for transmitting fluids is known as its
Antworten
  • impermeability.
  • permeability.
  • porosity.
  • competence.

Frage 37

Frage
A rock with very low porosity will most often have a
Antworten
  • low permeability.
  • large proportion of open spaces.
  • high permeability.
  • very high density.

Frage 38

Frage
A sub-surface region that holds and transmits water is called a/an
Antworten
  • aquiclude.
  • hydrometer.
  • water table.
  • aquifer.

Frage 39

Frage
The degree to which a soil or rock allows groundwater to flow is called
Antworten
  • permeability.
  • porosity.
  • aquifer.
  • hydraulic gradient.

Frage 40

Frage
The flow of groundwater depends on
Antworten
  • hydraulic gradient, and hydraulic conductivity.
  • porosity and permeability.
  • permeability only.
  • porosity only.

Frage 41

Frage
Groundwater is water
Antworten
  • below the water table.
  • above the water table.
  • that soaks into the ground.
  • beneath the ground surface.

Frage 42

Frage
The driving force of our planet's hydrologic cycle comes from
Antworten
  • wind.
  • precipitation of water over the oceans.
  • the balance between precipitation and evaporation.
  • solar energy.

Frage 43

Frage
A soil composed of flattened soil particles will most likely have a
Antworten
  • low porosity.
  • high permeability.
  • high porosity.
  • low hydraulic conductivity.

Frage 44

Frage
The flow of groundwater is
Antworten
  • from where the water table is high to where it is low.
  • insignificant.
  • as fast as the water in streams.
  • from where the water table is low to where it is high.

Frage 45

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A mineral that is not a silicate is
Antworten
  • calcite
  • quartz
  • feldspar
  • mica

Frage 46

Frage
Galena belongs to the class of minerals known as the
Antworten
  • sulfides
  • silicates
  • carbonates
  • sulfates

Frage 47

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Which of the following properties most clearly reflects the internal arrangement of atoms in a crystalline material?
Antworten
  • luster
  • density
  • color
  • cleavage

Frage 48

Frage
The process of crystallization acts to
Antworten
  • enrich the crystallized minerals in silica
  • deplete the molten magma of silica
  • enrich the molten magma in silica
  • none of the above

Frage 49

Frage
The last minerals to crystallize are those with the
Antworten
  • higher melting point
  • lower melting point

Frage 50

Frage
A soil composed of well-rounded sand grains of uniform size will most likely have a
Antworten
  • low porosity
  • high porosity
  • low permeability
  • high permeability

Frage 51

Frage
The following statement describes which subatomic particle best? It is a nucleon.
Antworten
  • an electron
  • a proton
  • a neutron
  • proton and neutron

Frage 52

Frage
How many electrons are there in the third shell of sodium, Na (atomic number 11)?
Antworten
  • none
  • one
  • two
  • three

Frage 53

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What is the name of the following compound? NaF
Antworten
  • natural fosfate
  • nitrogen afleck
  • sodium fluoride
  • sodium phosphide
  • natrium fluoride

Frage 54

Frage
Which of the following would be considered applied research?
Antworten
  • examining how susceptible a metal is to bending
  • determining how readily a metal corrodes in a wet environment
  • determining the lightest and strongest metal to be used for an airplane wing
  • determining the melting temperature of a metal
  • testing the strength of a piece of metal

Frage 55

Frage
Which of the following statements best describes an element?
Antworten
  • a material that has consistent physical properties
  • a material with more than one type of atom
  • a material consisting of only one type of atom
  • a material that has consistent chemical properties
  • a material that is pure

Frage 56

Frage
Which of these does not describe a metal at room temperature?
Antworten
  • bendable
  • gas
  • solid
  • liquid
  • shiny

Frage 57

Frage
How would you describe the volume of the following object? the amount of water in a swimming pool
Antworten
  • macroscopic
  • microscopic
  • submicroscopic
  • all of the above
  • none of the above

Frage 58

Frage
Which of the following physical properties would you expect for krypton (Kr)?
Antworten
  • shiny
  • brittle
  • conducts electricity
  • a gas at room temperature
  • hard

Frage 59

Frage
How many different elements are in the compound C₆H₁₂O₆.
Antworten
  • 3
  • 24
  • 6
  • All of the elements are the same.

Frage 60

Frage
Which of the following statements does not describe a proton?
Antworten
  • It orbits around the nucleus of an atom.
  • It is a nucleon.
  • It has a positive charge equivalent but opposite of an electron's.
  • It is attracted to negatively charged electrical plates.
  • It is much more massive than an electron.

Frage 61

Frage
Which of the following is not a nonmetal?
Antworten
  • sulfur (atomic no. = 16)
  • xenon (atomic no. = 54)
  • titanium (atomic no. = 22)
  • selenium (atomic no. = 34)
  • helium (atomic no. = 2)

Frage 62

Frage
Which of the following would be considered basic research?
Antworten
  • testing a safe, nontoxic mouse glue
  • testing the strength of a mouse cage
  • examining how quickly a trapdoor closes
  • examining why a mouse likes cheddar cheese more than swiss cheese
  • studying ways of catching mice safely

Frage 63

Frage
What is the main difference between a conceptual model and a physical model?
Antworten
  • Physical models and conceptual models can be used to describe the same things.
  • Physical models can only be used to represent the real world.
  • A physical model represents the shape and form while a conceptual model describes how a system behaves.
  • Conceptual models can only be used to describe concepts.
  • A conceptual model represents the shape and form while a physical model describes how a system behaves.

Frage 64

Frage
A cat strolls across your backyard. An hour later, a dog with its nose to the ground follows the trail of the cat. Explain what is going on from a molecular point of view.
Antworten
  • The dog is smelling molecules from the cat.
  • The cat is leading the dog into a trap.
  • The dog is smelling atoms from the cat
  • The dog is following the areas of increased density of the Earth.

Frage 65

Frage
If you remove two protons and two neutrons from a gold atom (Au), what new element is formed (if any)?
Antworten
  • Au-2
  • Au
  • Re
  • Tl
  • Ir

Frage 66

Frage
Oxygen atoms are used to make water molecules. Does this mean that oxygen, O2, and water, H2O, have similar properties?
Antworten
  • Yes, but that their properties are similar is only a coincidence.
  • Yes, and this explains how fish are able to breathe water.
  • No, compounds are uniquely different from the elements from which they're made.
  • No, but their similar properties are only a coincidence.

Frage 67

Frage
Which of the following would be considered a chemical property?
Antworten
  • melting temperature
  • reactivity towards water
  • boiling temperature
  • conductivity
  • flexibility

Frage 68

Frage
Which of the following statements about electrons is true?
Antworten
  • Electrons have a negative charge.
  • Electrons are particles.
  • Electrons in atoms can be excited by light energy.
  • Electrons behave like waves.
  • all of the above

Frage 69

Frage
Should the periodic table be memorized? Why or why not?
Antworten
  • No. The periodic table changes every year. Memorizing it would be a waste of time.
  • Yes. Without memorizing the periodic table, one would not have any real understanding of how and why chemical compounds are put together.
  • Yes. Like the alphabet, we need to memorize the periodic table in order to easily write the language of chemistry.
  • No. The periodic table is a reference to be used, not memorized.

Frage 70

Frage
The following image describes which type of change?
Image:
33982ffe-5db6-4dbb-9f79-2e91c84b6086 (image/jpeg)
Antworten
  • an elemental change
  • a chemical change
  • no change
  • a physical change
  • a change in reactivity

Frage 71

Frage
The mass number of an element is ________.
Antworten
  • the sum of the isotopes
  • the sum of the electrons and the neutrons
  • the number of protons
  • the sum of the protons and the neutrons
  • the sum of the electrons and the protons

Frage 72

Frage
How many atoms are in one molecule of Na₂SO₄
Antworten
  • 4
  • 7
  • 24
  • 2
  • 3

Frage 73

Frage
Which element has the atomic number 12?
Antworten
  • Mg
  • Be
  • B
  • Na
  • C

Frage 74

Frage
How is the term photon related to the term quantum?
Antworten
  • A quantum is a wave of light while a packet of quanta equals one photon.
  • A quantum is a particle of light while a photon is a wave of light.
  • A quantum of light is actually one photon.
  • A quantum is a particle of light exactly one photon long.
  • A quantum of photons is equal to the wavelength.

Frage 75

Frage
What was Niels Bohr's explanation for the observation of atomic spectra?
Antworten
  • Nucleons could be excited by different electron energies.
  • Any photon could excite an electron.
  • Only certain photons with the correct energy could excite the quanta in the nucleus.
  • Electrons could only move in discrete energy steps within an atom.
  • Electrons could not move in an atom.

Frage 76

Frage
Which of the following elements will most likely be shiny and flexible?
Antworten
  • iodine (I)
  • silicon (Si)
  • rhodium (Rh)
  • hydrogen (H)
  • helenium (Se)

Frage 77

Frage
The nucleus of an electrically neutral iron atom contains 26 protons. How many electrons does this iron atom have?
Antworten
  • 24
  • 52
  • 26
  • none

Frage 78

Frage
Why isn't dirt listed in the periodic table?
Antworten
  • Elements like dirt and air are so common that there is no need to list them in the periodic table.
  • Dirt IS listed in the periodic table but is not easily recognized because it is listed as one of the rare earths with its old scientific name, dysprosium, symbol Dy.
  • The periodic table lists only elements made of one kind of material. Dirt is a mixture of elements and compounds.
  • None of the above is true.

Frage 79

Frage
Strontium, Sr (number 38), is especially dangerous to humans because it tends to accumulate in calcium-dependent bone marrow tissues (calcium, Ca, number 20). This fact relates to the organization of the periodic table in that strontium and calcium are both
Antworten
  • in group 2 of the periodic table.
  • soluble in water
  • metals
  • made of relatively large atoms

Frage 80

Frage
Which of the following elements are in the same group as silicon (Si)?
Antworten
  • B
  • P
  • C
  • As
  • none of the above

Frage 81

Frage
What is the name of the following compound? CO2
Antworten
  • carbon dioxide
  • calcium oxide
  • dicobalt
  • calcium dioxide
  • dioxocarbon

Frage 82

Frage
Which of the following is said to be quantized?
Antworten
  • the volume of air in a balloon
  • the amount of water in a glass
  • the amount of time in an hour
  • the number of eggs in an egg carton
  • none of the above

Frage 83

Frage
What is the valence shell?
Antworten
  • It is the shell of electrons in element V (atomic no. = 23)
  • It is the last partially filled orbital in an atom.
  • It is the shell of electrons in an atom that is the least reactive.
  • It is the same as the orbital configuration.
  • It is the outermost shell of electrons in an atom.

Frage 84

Frage
Which contributes more to an atom's mass: electrons or protons? Which contributes more to an atom's size?
Antworten
  • Protons contribute more to an atom's mass while electrons contribute more to its size.
  • Protons contribute more to both the mass and size of an atom.
  • Electrons contribute more to both the mass and size of an atom.
  • Electrons contribute more to an atom's mass while protons contribute more to its size.

Frage 85

Frage
Elements that are in the same ________ have a tendency to have very similar chemical properties due to periodic trends.
Antworten
  • compound
  • group
  • textbook
  • row
  • period

Frage 86

Frage
What do the components of a conceptual model have in common?
Antworten
  • Each component must correlate with a corresponding component of a physical model.
  • All components interact with each other.
  • The components have nothing in common. This is what differentiates a conceptual model from a physical model.
  •   All components are mutually independent of each other.

Frage 87

Frage
Which of the following is an example of a physical change?
Antworten
  • charcoal being converted into ash
  • a candy bar being digested by a student
  • iron metal reacting with oxygen to form rust
  • water boiling and being converted into steam
  • water being electrolyzed and being converted in hydrogen and oxygen

Frage 88

Frage
Which of these properties describes a metal?
Antworten
  • fragile
  • brittle
  • doesn't conduct electricity very well
  • conducts heat very well
  • transparent

Frage 89

Frage
What is the name of the following compound? CaCl2
Antworten
  • calcium chloride
  • dicalcium chloride
  • carbon chloride
  • dichlorocalcium
  • calc two

Frage 90

Frage
Which are older, the atoms in the body of an elderly person or those in the body of a baby?
Antworten
  • It depends upon their diet.
  • An elderly person because they have been around much longer.
  • They are of the same age, which is appreciably older than the solar system.
  • A baby because this is surely a trick question.

Frage 91

Frage
Which of the following statements describes an isotope?
Antworten
  • element with the same number of protons but a different number of electrons
  • element with the same number of neutrons but a different number of electrons
  • element with the same number of protons but a different number of neutrons
  • element with the same number of neutrons but a different number of protons
  • none of the above

Frage 92

Frage
Would you use a physical model or a conceptual model to describe the following: the brain; the mind; the solar system; the beginning of the universe?
Antworten
  • physical; physical; physical; physical
  • conceptual; conceptual; conceptual; conceptual
  • physical; conceptual; physical; conceptual
  • conceptual; physical; conceptual physical

Frage 93

Frage
Which of the following could NOT be represented by a conceptual model?
Antworten
  • the energy of a nucleus
  • the floor plan of a house
  • the behavior of schoolchildren
  • the weather

Frage 94

Frage
Which of the following is a property of light?
Antworten
  • It is a particle.
  • Its energy comes in packets of uniform size.
  • It is a wave.
  • all of the above
  • none of the above

Frage 95

Frage
The repeating trends that take place when examining the elements are called ________.
Antworten
  • the metal shift
  • a group conscience
  • periodicity (periodic trend)
  • the family cycle
  • none of the above

Frage 96

Frage
Which of the following elements is an alkali metal?
Antworten
  • cerium (Cr)
  • argon (Ar)
  • lithium (Li)
  • lead (Pb)
  • indium (In)

Frage 97

Frage
Which atom is smallest?
Antworten
  • Be
  • Sr
  • Ca
  • Mg
  • All are the same size.

Frage 98

Frage
Which of the following elements is a transition metal?
Antworten
  •   lead (Pb)
  • xenon (Xe)
  • silver (Ag)
  • lithium (Li)
  • chlorine (Cl)

Frage 99

Frage
Which of the following describes a nonmetal?
Antworten
  • ductile
  • malleable
  • good conductor of heat
  • poor conductor of electricity
  • shiny

Frage 100

Frage
Which of the following elements are in the same period as magnesium (Mg)?
Antworten
  • Ca
  • Cl
  • Sr
  • Mn
  • none of the above

Frage 101

Frage
Metals are useful for the structural support of buildings because they
Antworten
  • do not conduct heat well
  • are strong but can be bent
  • conduct electricity
  • are shiny

Frage 102

Frage
Which of the following bonds would be the most polar?
Antworten
  • C-Cl
  • C-Br
  • C-F
  • C-I
  • All are equally polar.

Frage 103

Frage
Which of the following bonds would be the least polar?
Antworten
  • C-H
  • C-F
  • C-O
  • C-Cl
  • All are equally polar.

Frage 104

Frage
The source of an atom's electronegativity is the
Antworten
  • kinetic energy electrons have orbiting the nucleus.
  • repulsive force occurring among electrons within the same shell.
  • repulsive force occurring between electrons within neighboring shells.
  • positively charged atomic nucleus.

Frage 105

Frage
If you mix a typical aluminum ion (Al, atomic no. = 13) with a typical oxygen ion (O, atomic no. = 8), what compound is formed?
Antworten
  • Al2O3
  • Al13O8
  • Al3O2
  • Al3O
  • Al2O2

Frage 106

Frage
Which of the following elements will most likely not form an ion at all?
Antworten
  • Na
  • Mg
  • Br
  • O
  • Ar

Frage 107

Frage
Which of the following is the weakest?
Antworten
  • A dipole-induced dipole attraction
  • A dipole-dipole attraction
  • An induced dipole-induced dipole attraction
  • An ion-dipole attraction
  • A chemical bond

Frage 108

Frage
Which of the following compounds contains ionic bonds?
Antworten
  • CH4
  • OF2
  • Cl2
  • K2O
  • none of the above

Frage 109

Frage
If a neutral atom loses one electron, what is the electrical charge of the atom?
Antworten
  • +2
  • -2
  • +1
  • -1
  • neutral

Frage 110

Frage
What is the main difference between a dipole-dipole interaction and a dipole-induced dipole interaction?
Antworten
  • Dipole-induced dipole interactions are stronger because the induced dipoles can be formed at any time.
  • Dipole-dipole interactions are weaker because the dipoles are permanent.
  • Both are similar, but one involves a temporary dipole created by a permanent dipole.
  • Both are identical.
  • none of the above

Frage 111

Frage
Which of the following statements describes a polar molecule?
Antworten
  • The molecules are usually not attracted to one another very strongly.
  • Polar molecules have the weakest intermolecular interactions with ionic compounds.
  • The electrons in the molecule are distributed evenly throughout the molecule.
  • The molecules have a high degree of symmetry.
  • None of these statements describe polar molecules.

Frage 112

Frage
What is one role of unpaired valance electrons?
Antworten
  • They are the nonbonding electrons.
  • They tell us which Lewis dot structure is correct.
  • They take part in the formation of different types of bonds.
  • They keep the paired electrons separated to minimize interaction.
  • They provide the number of Lewis dots.

Frage 113

Frage
Which of the following does not describe ionic compounds?
Antworten
  • They have a tendency to melt easily.
  • They are usually very ordered.
  •   They consist of positive and negative ions.
  • They are held together by electrostatic attraction.
  • none of the above

Frage 114

Frage
Which of the following molecules is the most polar?
Antworten
  • HCl
  • BrF
  • Br2
  • CO

Frage 115

Frage
What is the valence shell?
Antworten
  • It is the shell of electrons in element V (atomic no. = 23)
  • It is the shell of electrons in an atom that is the least reactive.
  • It is the same as the orbital configuration.
  • It is the last partially filled orbital in an atom.
  • It is the outermost shell of electrons in an atom.

Frage 116

Frage
Which of the following best describes ionic bonding?
Antworten
  • two atoms exchanging a set of electrons
  • two atoms sharing a set of electrons
  • one atom giving up some of its electrons to another atom
  • when two elements with same charge are held together by electrostatic forces
  • none of the above

Frage 117

Frage
Which of the following statements is untrue?
Antworten
  • Covalent molecules usually have low melting points.
  • Covalent molecules can have nonbonding electrons.
  • Covalent bonds can involve more than one pair of electrons.
  • Covalent molecules are never crystalline.
  • All of the above statements are true.

Frage 118

Frage
Which of the following elements will most likely form an ion with a +1 charge?
Antworten
  • Al
  • Mg
  • Cl
  • Na
  • Si

Frage 119

Frage
Which of the following is not a property of metal?
Antworten
  • conducts electricity
  • is strong, but can be bent
  • does not conduct heat well
  • is shiny
  • All of the above are properties of metals.

Frage 120

Frage
How many valence electrons does bromine (Br, atomic no. = 35) have?
Antworten
  • 28
  • 7
  • 21
  • 1
  • 35

Frage 121

Frage
How is the number of unpaired valence electrons in an atom related to the number of bonds that the atom can form?
Antworten
  • There is no defined relationship between the number of unpaired valence electrons and number of bonds that the atom can form.
  • The number of unpaired valence electrons in an atom is the same as the number of bonds that the atom can form.
  • The number of unpaired valence electrons in an atom is twice the number of bonds that the atom can form.
  • The number of unpaired valence electrons in an atom is one-half the number of bonds that the atom can form.

Frage 122

Frage
Which of the following elements will most likely form an ion with a -2 charge?
Antworten
  • Mg
  • S
  • Cl
  • Ne
  • Na

Frage 123

Frage
How many valence electrons does gallium (Ga, atomic no. = 31) have?
Antworten
  • 1
  • 31
  • 3
  • 6
  • 70

Frage 124

Frage
Is an ionic compound an example of a chemical compound, or is a chemical compound an example of an ionic compound?
Antworten
  • An ionic compound is an example of a chemical compound.
  • Each is an example of the other.
  • An chemical compound is an example of a ionic compound.
  • Neither is an example of the other.

Frage 125

Frage
The concept of a chemical bond is ________.
Antworten
  • how two or more electrons reside in an orbital
  • the sharing of nucleons
  • how two or more atoms are held together
  • how much energy it takes to remove an electron from a set of atoms
  • none of the above

Frage 126

Frage
How would you classify the following material? a cappuccino (with foam)
Antworten
  •   a solution
  • a heterogeneous mixture
  • a suspension
  • a compound
  • an element

Frage 127

Frage
Why is secondary treatment often needed for sewage?
Antworten
  • The solution is contaminated with dangerous bacteria.
  • The dissolved organics are too high and lead to bacterial growth
  • There are too many finely divided particles that need to be filtered.
  • There are too many dissolved inorganic compounds.
  • none of the above

Frage 128

Frage
What is the difference between a compound and a mixture?
Antworten
  • The components of a mixture do not have the same properties individually as they do when mixed.
  • A compound can be physically separated into its components; a mixture cannot be physically separated into its components.
  • A compound is just a mixture of elements.
  • A mixture can be physically separated into its components; a compound cannot be physically separated into its components.
  • The components of a compound have the same properties individually as they do when mixed.

Frage 129

Frage
Which of the following statements describes a saturated solution?
Antworten
  • a solution of salt water with salt at the bottom
  • a carbonated beverage with bubbles
  • a solution where the solvent cannot dissolve any more solute
  • all of the above
  • none of the above

Frage 130

Frage
In a solution of 77 percent nitrogen and 23 percent oxygen, which is the solvent?
Antworten
  • nitrogen
  • oxygen
  • both
  • neither
  • Gases cannot form solutions.

Frage 131

Frage
What is molarity?
Antworten
  • the number of liters of solute per mole of solution
  • the number of moles of solute per liter of solution
  • the number of moles of solute per liter of solvent
  • the number of grams of solute per liter of solution
  • none of the above

Frage 132

Frage
What statement best describes a mole?
Antworten
  • It is a very large number chemists use to count atoms or molecules.
  • the amount of molecules or atoms in 1 gram of something
  • a very small number chemists use to count atoms or molecules
  • a little furry mammal that lives in the ground
  • none of the above

Frage 133

Frage
How would you classify the following material? swimming pool water
Antworten
  • heterogeneous mixture
  • a pure element
  • a pure compound
  • homogeneous mixture
  • depends on how many children have been in it

Frage 134

Frage
How does a suspension differ from a solution?
Antworten
  • A suspension is a heterogeneous mixture consisting of different phases whereas a solution is a homogeneous mixture consisting of a single phase.
  • The difference between a suspension and a solution can only be determined by chemical means.
  • A suspension is a heterogeneous mixture whose components can be separated by simple filtration. A solution is a homogeneous mixture which cannot be separated by simple filtration.
  • Although a solution and suspension are both homogeneous mixtures, only the components of a suspension will separate by spinning the mixture in a centrifuge.

Frage 135

Frage
Mixtures can be separated into their components by taking advantage of differences in the chemical properties of the components. Why might this separation method be less convenient than taking advantage of differences in the physical properties of the components?
Antworten
  • The chemical properties of the components of a mixture are too different from each other.
  • The chemical properties of the components of a mixture are too similar to each other.
  • A chemical property involves a chemical change so that you no longer have what you had.
  • Chemical properties are not as apparent as are physical properties.

Frage 136

Frage
The following image represents which kind of matter?
Image:
1ddaebb3-7706-4e45-84eb-20836e75a219 (image/jpeg)
Antworten
  •   a compound
  • an element
  • a mixture
  • none of the above
  • all of the above

Frage 137

Frage
The following image represents which kind of matter?
Image:
4868c6cb-a04f-4d7f-8dc9-14235428559d (image/jpeg)
Antworten
  • an element
  • a mixture
  • a compound
  • none of the above
  • all of the above

Frage 138

Frage
Which of the following solutions is the most concentrated?
Antworten
  • 0.1 liter of water with 1 gram of sugar
  • 0.5 liter of water with 50 grams of sugar
  • 2 liters of water with 0.2 gram of sugar
  • 3 liters of water with 30 grams of sugar
  • They all have the same concentration.

Frage 139

Frage
Is the air in your house a homogeneous or heterogeneous mixture?
Antworten
  • heterogeneous because of the dust particles it contains
  • homogeneous because it is all at the same temperature
  • homogeneous because it is mixed very well
  • heterogeneous because it consists of different types of molecules

Frage 140

Frage
What is the first step in treating raw sewage?
Antworten
  • removal of sludge
  • removal of grit by settling
  • filtration of solids
  •   disinfection
  • removal of fine particles by settling

Frage 141

Frage
Which has the most atoms?
Antworten
  • a mole of helium
  • a mole of gold
  • a mole of lead
  • All of the above have the same number of atoms.
  • none of the above

Frage 142

Frage
Which of the following would be considered a heterogeneous mixture?
Antworten
  • water
  • milk
  • vinegar
  • vegetable oil
  • salad dressing

Frage 143

Frage
In a solution made from one teaspoon of sugar and one liter of water, which is the solute?
Antworten
  • sugar
  • the teaspoon
  • water
  • both sugar and water
  • none of the above

Frage 144

Frage
Which of the following is a mixture?
Antworten
  • helium
  • iron
  • air
  • gold
  • salt

Frage 145

Frage
What is the purpose of treating water with chlorine gas or ozone during water purification?
Antworten
  • to improve taste
  • to kill bacteria
  • to improve color
  • to remove solids
  • none of the above

Frage 146

Frage
How is the solubility of a gas affected by temperature?
Antworten
  • As temperature goes up, the solubility goes up.
  • As temperature goes up, the solubility stays the same.
  • As temperature goes down, the solubility goes down.
  • As temperature goes down, the solubility goes up.
  • Both: As temperature goes up, the solubility goes up....And: As temperature goes up, the solubility stays the same.

Frage 147

Frage
How is the solubility of a solid affected by temperature?
Antworten
  • As temperature goes up, the solubility goes up.
  • As temperature goes down, the solubility goes down.
  • As temperature goes down, the solubility goes up.
  • As temperature goes up, the solubility goes down.
  • Both: As temperature goes up, the solubility goes up. ....And: As temperature goes down, the solubility goes down.

Frage 148

Frage
Which of the following accurately describes osmosis?
Antworten
  • The less concentrated solution gets more dilute.
  • The more concentrated solution absorbs water from the less concentrated solution.
  • The less concentrated solution absorbs water from the more concentrated solution.
  • The ions migrate from the more concentrated solution to the less concentrated.
  • none of the above

Frage 149

Frage
How would you classify the following material? coffee (with milk)
Antworten
  • an element
  • a compound
  • a suspension
  • a heterogeneous mixture
  • a solution

Frage 150

Frage
Which of the following would be considered a homogeneous mixture?
Antworten
  • hydrogen cyanide
  • wine
  • pretzel
  • rusty iron
  • sugar
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