1.
|
Which of the following is a difference between metals and nonmetals?
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A)
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Metals contain electrons, nonmetals do not.
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B)
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Metals are good conductors of electricity; nonmetals are not.
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C)
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Nonmetals are all gases while metals are all solids.
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D)
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none of the above
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2.
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Sodium (Na) and cesium (Cs) are members of which of the following categories?
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A)
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alkali metals
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B)
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alkaline earth metals
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C)
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Halogens
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D)
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noble gases
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3.
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Helium (He) and radon (Rn) are members of which of the following categories?
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A)
|
alkali metals
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B)
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alkaline earth metals
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C)
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Halogens
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D)
|
noble gases
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4.
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Elements whose names end with ium are usually metals; sodium is one example. Identify a nonmetal whose name also ends with ium.
| |
A)
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Potassium
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B)
|
Magnesium
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C)
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Helium
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D)
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Barium
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5.
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What is the difference between an atom and a molecule?
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A)
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A molecule has more electrons than an atom.
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B)
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An atom is charged while a molecule is not.
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C)
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A molecule is an aggregate of atoms, while an atom, by definition, is a single particle.
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D)
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A molecule is bigger than an atom.
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6.
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How are allotropes different from isotopes?
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A)
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Allotropes are ionic, while isotopes are not.
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B)
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Allotropes are gases, while isotopes are generally solids.
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C)
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Allotropes are single atoms, while isotopes are aggregates of atoms.
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D)
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Allotropes are different molecular combinations of a single element; isotopes are atoms of the same element with different masses.
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7.
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NH4+ is an example of which of the following?
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A)
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a monatomic cation
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B)
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a monatomic anion
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C)
|
a polyatomic cation
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D)
|
a polyatomic anion
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8.
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Which of the following is an element?
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A)
|
N2
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B)
|
NH3
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C)
|
NO
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D)
|
CO
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9.
|
Which of the following is a compound?
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A)
|
N2
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B)
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H2
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C)
|
O3
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D)
|
SO2
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