6431889
Descripción
Test por Afia Oduro-Manu, actualizado hace más de 1 año
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Creado por Afia Oduro-Manu
hace alrededor de 8 años
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Pregunta 1
Pregunta
The basic unit of matter is called an [blank_start]atom[blank_end]
Respuesta
-
atom
Pregunta 2
Pregunta
What subatomic particles make up atoms?
Respuesta
-
Isotopes
-
Protons
-
Particles
-
Neutrons
-
Molecules
-
Electrons
Pregunta 3
Pregunta
PROTONS determine an element's...
Respuesta
-
Atomic mass
-
Atomic number
-
Number on the periodic table
-
Atomic weight
-
Nucleus's Charge
Pregunta 4
Pregunta
Isotopes are...
Respuesta
-
Atoms of a DIFFERENT element that have the SAME number of neutrons they contain
-
ATOMS of a DIFFERENT element that have DIFFERENT number of neutrons
-
Atoms of the SAME element that DIFFER in the number of neutrons the contain
-
Atoms of the SAME element that have the SAME number of neutrons
Pregunta 5
Pregunta
Where in an atom do PROTONS and NEUTRONS lie?
Respuesta
-
Orbit
-
Nucleus
-
Outside of the atom's orbit
-
Close to the circumference of the nuclues
Pregunta 6
Pregunta
All atoms of the same element have the same number of...
Respuesta
-
Electrons
-
Neutrons
-
Protons
-
Molecules
Pregunta 7
Pregunta
What subatomic particle determines what the element is?
Respuesta
-
Protons
-
Neutrons
-
Electrons
-
Isotopes
Pregunta 8
Pregunta
ELECTRONS orbit around the nucleus of an atom.
Respuesta
- True
- False
Pregunta 9
Pregunta
What is the weakest type of chemical bond?
Respuesta
-
Covalent
-
Hydrogen
-
Ionic
Pregunta 10
Pregunta
What element forms chemical bonds?
Respuesta
-
Oxygen
-
Carbon
-
Hydrogen
-
Helium
Pregunta 11
Pregunta
COVALENT BONDS are formed when...
Respuesta
-
Electrons in an atom are transferred to another atom
-
Electrons in an atom are shared
-
Electrons in an atom bond with the atom's neutrons
-
Electrons travel between the nuclei of both atoms
Pregunta 12
Pregunta
IONIC BONDS are formed when...
Respuesta
-
Electrons are “stolen” from one atom and taken to the next
-
Electrons are shared between atoms
-
Some of the atom's electrons are transferred to another atom
-
Another atom destroys its own protons to weaken its bond
Pregunta 13
Pregunta
The number of NEUTRONS and ELECTRONS in an atom are usually always the same.
Respuesta
- True
- False
Pregunta 14
Pregunta
How many types of substances make a CHEMICAL ELEMENT?
Respuesta
-
1
-
2
-
3
-
4
Pregunta 15
Pregunta
Why are atoms NEUTRAL despite having charged particles?
Respuesta
-
Same amount of PROTONS and ELECTRONS balance out the charge in an atom
-
Same amount of PROTONS and NEUTRONS balance out the charge in an atom
-
Different amounts of PROTONS and ELECTRONS maintain stability in an atom
-
Different amounts of ELECTRONS and NEUTRONS balance out the charges in an atom
Pregunta 16
Pregunta
How are isotopes identified?
Respuesta
-
Atomic number
-
Atomic mass
-
Atomic balance
-
Atomic neutrality
Pregunta 17
Pregunta
Atomic [blank_start]mass[blank_end] is the [blank_start]weighted[blank_end] average of the masses of an element's [blank_start]isotopes[blank_end]
Respuesta
-
mass
-
number
-
weight
-
measured
-
weighted
-
divided
-
electrons
-
neutrons
-
protons
-
isotopes
Pregunta 18
Pregunta
WEIGHTED in Biology/Chemistry/Physics means the [blank_start]abundance[blank_end] of each [blank_start]isotope[blank_end] in [blank_start]nature[blank_end] is considered when the average is calculated
Respuesta
-
abundance
-
lack
-
isotope
-
Electron
-
Proton
-
Neutron
-
nature
-
similarities
-
differences
Pregunta 19
Pregunta
Why do all isotopes of an element have the same chemical properties?
Respuesta
-
Because they have DIFFERENT numbers of PROTONS
-
Because they have ALMOST EQUAL amounts of MOLECULES
-
Because they have DIFFERENT numbers of NEUTRONS
-
Because they SHARE the same number of ELECTRONS
Pregunta 20
Pregunta
A chemical compound is formed when [blank_start]2+[blank_end] elements are combined chemically
Respuesta
-
0-1
-
1-2
-
2+
-
2-3
Pregunta 21
Pregunta
The formula for table salt is [blank_start]NaCl[blank_end]
Respuesta
-
SmCl
-
SoCl
-
NaCl
-
SiCl
Pregunta 22
Pregunta
Sodium is a [blank_start]metal[blank_end] and chloride is a [blank_start]gas[blank_end].
Respuesta
-
gas
-
metal
-
gas
-
metal
Pregunta 23
Pregunta
An ion is an atom that is...
Respuesta
-
Negatively charged
-
Positively charged
-
Neutrally charged
Pregunta 24
Pregunta
An atom that loses electrons has a negative charge.
Respuesta
- True
- False
Pregunta 25
Pregunta
A [blank_start]triple[blank_end] [blank_start]covalent[blank_end] bond is formed when [blank_start]six[blank_end] electrons are shared.
Respuesta
-
covalent
-
ionic
-
single
-
triple
-
double
-
two
-
six
-
four
Pregunta 26
Pregunta
In a [blank_start]water[blank_end] molecule, each [blank_start]hydrogen[blank_end] atom forms a [blank_start]single[blank_end] covalent bond.
Respuesta
-
hydrogen
-
water
-
hydrogen
-
carbon
-
single
-
double
Pregunta 27
Pregunta
The slight attractions that develop between oppositely charged region of nearby particles are called
[blank_start]Van der Waals forces[blank_end]
Respuesta
-
Van der Waals forces
Pregunta 28
Pregunta
Acidic solutions are [blank_start]compounds[blank_end] that form [blank_start]H+ ions[blank_end] in solution.
Respuesta
-
compounds
-
H+ ions
Pregunta 29
Pregunta
Water molecules are polar because of [blank_start]uneven[blank_end] distribution [blank_start]between[blank_end] their two poles (the [blank_start]negative[blank_end] attracts [blank_start]oxygen[blank_end] and the positive attracts [blank_start]hydrogen[blank_end] atoms).
Respuesta
-
uneven
-
equal
-
positive
-
negative
-
oxygen
-
hydrogen
-
oxygen
-
hydrogen
-
between
-
outside of
-
around
Pregunta 30
Pregunta
Substances that combine physically form [blank_start]mixtures[blank_end], while substances that combine chemically form [blank_start]compounds[blank_end].
Respuesta
-
mixtures
-
compounds
Pregunta 31
Pregunta
Acidic solutions have lesser concentrations of H+ ions than pure water.
Respuesta
- True
- False
Pregunta 32
Pregunta
Basic solutions produce...
Respuesta
-
OH- (hydroxide) ions
-
Small amounts of H+ ions
-
O- ions
-
HO- ions
Pregunta 33
Pregunta
[blank_start]Acidic[blank_end] solutions have pH levels below [blank_start]7[blank_end], and even from [blank_start]1[blank_end] to [blank_start]3[blank_end].
Respuesta
-
Acidic
-
7
-
1
-
3
Pregunta 34
Pregunta
The polar, neutral WATER molecule has an equal amount of protons and electrons, [blank_start]10[blank_end] each.
Respuesta
-
10
Pregunta 35
Pregunta
The attraction between the hydrogen atom on [blank_start]water[blank_end] molecule and the [blank_start]oxygen[blank_end] atom on another water molecule is an example.
Respuesta
-
water
-
oxygen
Pregunta 36
Pregunta
The two forms of attraction are [blank_start]co[blank_end]hesion and [blank_start]ad[blank_end]hesion.
Respuesta
-
co
-
ad
Pregunta 37
Pregunta
An evenly (molecule) mixed mixture is called a [blank_start]solution[blank_end].
Respuesta
-
solution
Pregunta 38
Pregunta
The greatest solvent in the world is [blank_start]water[blank_end].
Respuesta
-
water
Pregunta 39
Pregunta
Suspension is mixtures of...
Respuesta
-
Water and dissolved material
-
Water and undissolved material
-
Water and partly dissolved material
Pregunta 40
Pregunta
The solute the substance that is dissolved in the solution.
Respuesta
- True
- False
Pregunta 41
Pregunta
The pH scale indicates the concentration of [blank_start]H+ ions[blank_end] in a [blank_start]solution[blank_end].
Respuesta
-
solution
-
H+ ions
Pregunta 42
Pregunta
A solution with a pH of 4 has [blank_start]40[blank_end] [blank_start]H+[blank_end] [blank_start]ions[blank_end], while one with a pH of 5 has [blank_start]50[blank_end],
Respuesta
-
40
-
50
-
H+
-
ions
Pregunta 43
Pregunta
Basic solutions have pH levels [blank_start]high[blank_end]er than [blank_start]7[blank_end], and especially from [blank_start]11[blank_end] to [blank_start]14[blank_end].
Respuesta
-
7
-
11
-
14
-
high
Pregunta 44
Pregunta
Buffers are [blank_start]weak[blank_end] [blank_start]acids/bases[blank_end] that can react with [blank_start]strong acids[blank_end] to prevent [blank_start]sharp[blank_end], [blank_start]sudden[blank_end] changes in pH.
Respuesta
-
weak
-
sharp
-
sudden
-
strong acids
-
acids/bases
Pregunta 45
Pregunta
Carbohydrates contain the following atoms...
Respuesta
-
Oxygen
-
Helium
-
Carbon
-
Hydrogen
Pregunta 46
Pregunta
Single sugar molecules are also called [blank_start]Monosaccharides[blank_end]
Respuesta
-
Monosaccharides
Pregunta 47
Pregunta
Some monosaccarides are...
Respuesta
-
Glucose
-
Galactose
-
Fructose
-
Glycogen
Pregunta 48
Pregunta
Some polysaccarides are...
Respuesta
-
Glucose
-
Glycogen
-
Starch
-
Fructose
-
Cellulose
Pregunta 49
Pregunta
What are the main functions of carbohydrates?
Respuesta
-
As an energy suppliant
-
To store starch
-
For strength and rigidity in an animal/plant
Pregunta 50
Pregunta
What atoms are lipids made of?
Respuesta
-
Helium
-
Hydrogen
-
Carbon
-
Oxygen
Pregunta 51
Pregunta
THe three categories of lipids are...
Respuesta
-
Saturated
-
Unsaturated
-
Monosaturated
-
Polyunsaturated
Pregunta 52
Pregunta
When glycerol is combined with [blank_start]fatty acids[blank_end] a lipid is formed.
Respuesta
-
fatty acids
Pregunta 53
Pregunta
SATURATED LIPIDS contain one carbon bond, UNSATURATED LIPIDS contain 1+ carbon bonds, while POLYUNSATURATED LIPIDS contain 2+ carbon bonds
Respuesta
- True
- False
Pregunta 54
Pregunta
Nucleic acids contain what type of atoms
Respuesta
-
Hydrogen
-
Helium
-
Carbon Dioxide
-
Carbon
-
Oxygen
-
Nitrogen
-
Phosporous
Pregunta 55
Pregunta
[blank_start]Nucleotides[blank_end] are the monomers of nucleic acids.
Respuesta
-
Nucleotides
Pregunta 56
Pregunta
Nucleic acids are composed of a [blank_start]5-carbon[blank_end] sugar, a [blank_start]phosphate group[blank_end] [blank_start](-PO4)[blank_end], and a [blank_start]nitrogenous[blank_end] base.
Respuesta
-
phosphate group
-
(-PO4)
-
nitrogenous
-
5-carbon
Pregunta 57
Pregunta
Nucleic acids keep genetic information and transport energy.
Respuesta
- True
- False
Pregunta 58
Pregunta
RNA ([blank_start]Ribonucleic[blank_end] acid) is made out of [blank_start]ribose[blank_end] sugar and DNA ([blank_start]Deoxyribonucleic[blank_end] acid) is made out of [blank_start]deoxyribose[blank_end] sugar.
Respuesta
-
deoxyribose
-
Deoxyribonucleic
-
ribose
-
Ribonucleic
Pregunta 59
Pregunta
Proteins are composed of the atoms...
Respuesta
-
Nitrogen
-
Helium
-
Carbon
-
Phosphorous
-
Hydrogen
-
Oxygen
Pregunta 60
Pregunta
The monomers of protein are...
Respuesta
-
Carbon bonds
-
Amino acids
-
Protein
-
Protein acids
Pregunta 61
Pregunta
Proteins
1)Control the rate of reactions
2)Regulate cell processes
3)Form cell membranes
4)Transport substances in or out of cells
5)Work with the immune system
Respuesta
- True
- False
Pregunta 62
Pregunta
Valence electrons have [blank_start]stable[blank_end] or [blank_start]non-reactive[blank_end] [blank_start]shells[blank_end] and determine [blank_start]reactivity[blank_end] on the [blank_start]outer ring[blank_end] of the atom.
Respuesta
-
stable
-
non-reactive
-
shells
-
reactivity
-
outer ring
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