Section #: 3.2
How Atoms Combine
Practice Test
1.
What is the attractive force between two particles of opposite charge called?
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a.
an ionic bond
b.
an isotope
c.
a compound force
d.
a covalent bond
2.
Bases produce __________ in solution.
a.
hydrogen ions
b.
oxygen ions
c.
hydroxide ions
d.
helium ions
Hint
3.
The attraction of two atoms for a shared pair of electrons that hold the atoms together is called __________.
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a.
a chemical reaction
b.
an ionic bond
c.
a compound
d.
a covalent bond
Hint
4.
What is an ion?
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a.
a gas
b.
a molecule
c.
an isotope
d.
a charged particle
Hint
5.
What makes an element stable?
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a.
if it has a covalent bond
b.
if its nucleus is packed tightly
c.
if its outermost energy level is full
d.
if it has the same number of neutrons and protons
Hint
6.
Why does a water molecule have a bent shape?
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a.
it's a compound
b.
it has ionic bonds
c.
it's a polar molecule
d.
because it occurs on Earth as a solid, liquid, and a gas
Hint
7.
An Mg +2 particle has __________ electrons.
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a.
lost four
b.
lost two
c.
gained one
d.
gained two
Hint
8.
A __________ is composed of two or more atoms held together by covalent bonds.
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a.
molecule
b.
a gas
c.
ionic bond
d.
covalent bond
Hint
