Physical Science, New York Edition

Chapter 20: Chemical Bonds

Self-Check Quiz.-Eng.

1.
In a covalent bond, electrons are __________.
A)shared
B)lost
C)gained
D)destroyed
2.
NaCl is the chemical formula for what?
A)water
B)chlorine gas
C)sodium chloride
D)sodium metal
3.
The atom that contains the fewest electrons is __________.
A)helium
B)water
C)hydrogen
D)oxygen
4.
In sodium chloride, which atom loses an electron?
A)chloride
B)sodium
C)salt
D)neither
5.
Why is potassium iodine added to table salt?
A)to add to the flavor of salt
B)Iodine is in the formula for table salt.
C)Iodine is an element essential for health.
D)Table salt causes high blood pressure.
6.
The iodine ion I- carries what type of charge?
A)positive
B)neutral
C)both
D)negative
7.
Francium, which is in the same chemical family as sodium, will carry what type of charge?
A)negative
B)neutral
C)both
D)positive
8.
What kind of charge does an ionic compound carry?
A)neutral
B)positive
C)negative
D)unknown
9.
How many electrons are shared in a double bond?
A)one pair
B)two pairs
C)one
D)two
10.
Is a molecule of hydrogen chloride (HCl) polar or nonpolar?
A)nonpolar
B)neither
C)polar
D)both
11.
When elements form bonds, it changes their __________ properties.
A)chemical
B)physical
C)mass
D)chemical and physical
12.
<cast>(Q61111d) A molecule of oxygen gas (O[subscript]2) is __________.
A)nonpolar
B)polar
C)ionic
D)an atom
Physical Science - New York Edition
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