Questão 1
Questão
Noble gases do not participate in any chemical reactions.
Responda
-
True. Absolutely all of them do not participate in any chemical reactions.
-
False. The heavier ones are found to participate in chemical reactions, mostly with fluorine and oxygen.
-
False. Most of them participate in chemical reactions, contrary to popular belief.
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Scientists are not yet sure.
Questão 2
Questão
These are a group of elements that have their outermost electron occupying their outer s or p orbital
Questão 3
Questão
These electrons have the greatest influence on the properties of elements
Questão 4
Questão
Adding an electron to an __ usually causes dramatic changes in the physical and chemical properties of the atom
Responda
-
s or p orbital
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d or f orbital
-
s or d orbital
-
p or f orbital
Questão 5
Questão
Within a family of representative elements, atomic radii __ from top to bottom. Across a period, it __ from left to right.
Responda
-
increases; decreases
-
decreases; increases
-
increases; increases
-
decreases; decreases
Questão 6
Questão
It is a measure of the minimum amount of energy required to remove the most loosely bound electron from an isolated gaseous atom to form an ion with a 1+ charge.
Responda
-
Ionization Energy
-
Activation Energy
-
Electron Affinity
-
Electronegativity
Questão 7
Questão
For a given element, the first ionization energy is always __ the second ionization energy.
Responda
-
greater than
-
less than
-
almost equal to
-
unrelated to
Questão 8
Questão
The first ionization energies generally __ from left to right across the period, and __ from top to bottom within a family.
Responda
-
increases; decreases
-
decreases; increases
-
increases; increases
-
decreases; decreases
Questão 9
Questão
Elements from Group __ are exceptions of the periodic trend of first ionization energies because __.
Responda
-
2A; having a fully filled s orbital makes them almost as stable as noble gases
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3A; it is easier to remove the lone p1 electron than the fully filled s orbital
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4A; this is what experimental data is suggesting
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8A; they are the noble gases
Questão 10
Questão
Elements with low ionization energies form __.
Responda
-
ionic compounds by losing electrons to form cations
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ionic compounds by gaining electrons to form anions
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molecular compounds by sharing electrons with other elements
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None of the above
Questão 11
Questão
Elements with intermediate ionization energies form __.
Responda
-
ionic compounds by losing electrons to form cations
-
ionic compounds by gaining electrons to form anions
-
molecular compounds by sharing electrons with other elements
-
None of the above
Questão 12
Questão
Elements with very high ionization energies form __.
Responda
-
ionic compounds by losing electrons to form cations
-
ionic compounds by gaining electrons to form anions
-
molecular compounds by sharing electrons with other elements
-
None of the above
Questão 13
Questão
It is defined as the energy change when an electron is added to an isolated gaseous atom to form an ion with a 1- charge.
Responda
-
Ionization Energy
-
Activation Energy
-
Electron Affinity
-
Electronegativity
Questão 14
Questão
Species are isoelectronic when __.
Responda
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when they have the same electron affinity
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when they have the same electronegativity
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they have the same number of electrons
-
their outermost electron are in the same suborbital
Questão 15
Questão
Elements from the left side of the periodic table __ to attain noble gas configurations. By contrast, elements from the right side __.
Responda
-
lose electrons; gain electrons
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gain electrons; lose electrons
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lose protons; gain protons
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gain protons; lose protons
Questão 16
Questão
Simple __ are always smaller than the neutral atoms. Conversely, simple __ are always larger.
Responda
-
negatively charged ions (anions)
positively charged ions (cations)
-
positively charged ions (cations)
negatively charged ions (anions)
-
This question does not make sense.
-
Why am I even here?
Questão 17
Questão
Both cation and anion sizes __ going down a group.
Responda
-
increase
-
decrease
-
vary irregularly
Questão 18
Questão
Within an isoelectric series, ionic radii __ with __ atomic number because of __ nuclear charge.
Responda
-
increase
increasing
increasing
-
decrease
decreasing
decreasing
-
decrease
increasing
increasing
-
increase
decreasing
decreasing
Questão 19
Questão
It is a measure of the relative tendency of an atom to attract electrons to itself when it is chemically combined with another atom.
Responda
-
Ionization Energy
-
Activation Energy
-
Electron Affinity
-
Electronegativity
Questão 20
Questão
Elements with high electronegativities are often __ that gain electrons to form __; those with low are often __ that lose electrons to form __.
Responda
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metals; cations
nonmetals; anions
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nonmetals; anions
metals; cations
-
metalloids; cations
metals; cations
-
metalloids; cations
nonmetals; anions
Questão 21
Questão
For representative elements, electronegativities usually __ from left to right across periods and __ from top to bottom within groups.
Responda
-
increase
decrease
-
decrease
increase
-
increase
increase
-
decrease
decrease
Questão 22
Questão
Electronegativities of the elements are expressed on a somewhat arbitrary scale, called the __.
Responda
-
Cavendish scale
-
Arrhenius scale
-
Oswald scale
-
Pauling scale
Questão 23
Questão
Two elements with a large difference in electronegativities tend to react with each other to form __ compounds, whereas those with similar electronegativities tend to form __ bonds.
Questão 24
Questão
In simple ionic compounds, it is the number of electrons gained or lost by an atom when forming a compound. For single atom ions, it is the actual charge on the ion.
Responda
-
Atomic number
-
Nucleon number
-
Oxidation state
-
None of the above
Questão 25
Questão
For the most electronegative element, __, the oxidation state is always __.
Responda
-
hydrogen; +1
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lithium; +1
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fluorine; -1
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oxygen; -2
Questão 26
Questão
He discovered hydrogen which he prepared by passing steam through a red-hot gun barrel, and by reaction of acids with reactive metals.
Responda
-
Joseph Priestly
-
Henry Cavendish
-
Pierre Janssen
-
Norman Lockyer
Questão 27
Questão
It is currently not very economical to use solar power to continuously electrolyte water to produce hydrogen gas because __.
Responda
-
it is extremely reactive and unstable
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it is dangerous to transport due to the fact that it is the lightest gas and can easily leak out
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it is extremely poisonous to humans
-
it smells really bad
Questão 28
Questão
Hydrogen reacts with metals and other nonmetals to form binary compounds called __.
Responda
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hydrides
-
hydrates
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hydrites
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acids
Questão 29
Questão
__ are binary compounds containing H- ions, formed when hydrogen gains one electron from an active metal. By contrast, __ contain H+ ions, formed when hydrogen shares electrons with another nonmetal.
Responda
-
Ionic hydrides
molecular hydrides
-
Molecular hydrides
ionic hydrides
-
Ionic hydrates
molecular hydrates
-
Molecular hydrates
ionic hydrates
Questão 30
Questão
__ are all basic because they react with water to form hydroxide ions, whereas many __ are acidic because their aqueous solutions contain hydrogen cations.
Responda
-
Ionic hydrides
molecular hydrides
-
Molecular hydrides
ionic hydrides
-
Ionic hydrates
molecular hydrates
-
Molecular hydrates
ionic hydrates
Questão 31
Questão
The primary industrial use of hydrogen gas is for the synthesis of __ by the Haber process.
Responda
-
hydrochloric acid
-
sulfuric acid
-
sodium bicarbonate
-
ammonia
Questão 32
Questão
He discovered oxygen in 1774 by observing the thermal decomposition of mercury (II) oxide, a red powder, to form liquid mercury and a colorless gas.
Responda
-
Joseph Priestly
-
Henry Cavendish
-
Pierre Janssen
-
Norman Lockyer
Questão 33
Questão
The earth - land, water, and air - is approximately __ % oxygen by mass.
Questão 34
Questão
Oxygen is __ soluble in water.
Questão 35
Questão
Oxygen forms oxides by direct combination with all other elements, except the noble gases and noble metals. Which of the following is not a noble metal?
Questão 36
Questão
Which of the following kind of metallic oxide has oxygen atoms with an oxidation state of -1?
Responda
-
Normal oxides
-
Peroxides
-
Superoxides
-
None of the above
Questão 37
Questão
Which of the following kind of metallic oxide has oxygen atoms with an oxidation state of -1/2?
Responda
-
Normal oxides
-
Peroxides
-
Superoxides
-
None of the above
Questão 38
Questão
Metals that exhibit variable oxidation states (mostly transition metals) react with a limited amount of oxygen to give oxides with __ oxidation states, whereas those that react with excess oxygen give oxides with __ oxidation states.
Responda
-
lower
higher
-
higher
lower
-
lower
lower
-
higher
higher
Questão 39
Questão
Oxides of __ are called basic anhydrides (or basic oxides) because many of them combine with water to form bases with no change in oxidation state of the __.
Responda
-
nonmetals
-
metals
-
metalloids
-
noble gases
Questão 40
Questão
__ oxides are called acid anhydrides (or acidic oxides) because many of them dissolve in water to form acids with no change in oxidation state of the __.
Responda
-
nonmetals
-
metals
-
metalloids
-
noble gases
Questão 41
Questão
Oxygen combines with __ to form molecular oxides.
Responda
-
nonmetals
-
metals
-
metalloids
-
noble gases
Questão 42
Questão
__ oxides of nonmetals react with water to give solutions of ternary acids (which contain elements usually H, O, and another nonmetal).
Responda
-
A few
-
About half
-
About a third
-
Nearly all
Questão 43
Questão
The combination of basic anhydrides with acid anhydrides, with no change in oxidation states, form __.
Responda
-
hydrogen gas
-
oxygen gas
-
salts
-
water
Questão 44
Questão
It is an oxidation-reduction reaction in which oxygen combines rapidly with oxidizable materials in highly exothermic reactions, usually with a visible flame.
Responda
-
Combustion
-
Condensation
-
Evaporation
-
Oxidation
Questão 45
Questão
It is an oxide that shows some acidic and some basic properties.
Responda
-
Amphoteric oxide
-
Aliphatic oxide
-
Anhydrous oxide
-
Amphiprotic oxides
Questão 46
Questão
It is a species containing one or more unpaired electrons, and are very reactive.
Responda
-
Ion
-
Irrational
-
Radical
-
None of the above
Questão 47
Questão
It is the process of heating an ore of an element in the presence of air.
Responda
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Refining
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Roasting
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Purifying
-
Combustion