Physical Science

Chapter 20: Chemical Bonds

Chemical Bonds

1.
In a covalent bond, electrons are __________.
A)lost
B)gained
C)shared
D)destroyed
2.
Chemical compounds are __________.
A)always unstable
B)more stable than their individual elements
C)less stable than their individual elements
D)always stable
3.
Francium, which is in the same chemical family as sodium, will carry what type of charge?
A)both
B)negative
C)neutral
D)positive
4.
What is the difference between carbon monoxide and carbon dioxide?
A)Carbon monoxide has only one oxygen atom.
B)Carbon dioxide has two carbon atoms.
C)Carbon monoxide has two carbon atoms.
D)Carbon dioxide has only one oxygen atom.
5.
Is a molecule of hydrogen chloride (HCl) polar or nonpolar?
A)polar
B)nonpolar
C)both
D)neither
6.
The atom that contains the fewest electrons is __________.
A)water
B)hydrogen
C)oxygen
D)helium
7.
When elements form bonds, it changes their __________ properties.
A)mass
B)chemical and physical
C)physical
D)chemical
8.
Why is potassium iodine added to table salt?
A)Table salt causes high blood pressure.
B)Iodine is in the formula for table salt.
C)to add to the flavor of salt
D)Iodine is an element essential for health.
9.
Compounds that are hydrates contain what ingredient?
A)nitrogen
B)water
C)hydrogen chloride
D)chlorine
10.
What kind of charge does an ionic compound carry?
A)unknown
B)negative
C)neutral
D)positive
11.
The iodine ion I- carries what type of charge?
A)positive
B)neutral
C)negative
D)both
12.
Binary compounds are composed of __________ atoms.
A)one
B)two
C)many
D)four
13.
NaCl is the chemical formula for what?
A)sodium chloride
B)sodium metal
C)water
D)chlorine gas
14.
How many electrons are shared in a double bond?
A)two pairs
B)one
C)two
D)one pair
15.
For an ion, the oxidation number is __________.
A)always negative
B)zero
C)the same as the charge on the ion
D)one less than the charge on the ion
16.
In general, noble gases react with __________.
A)nothing
B)metals
C)other noble gases
D)water
17.
A binary compound made with phosphorus will end with the word __________.
A)phosphate
B)phosphorus
C)phosphite
D)phosphide
18.
When an atom's outer energy levels are not filled completely, the atom __________.
A)is a noble gas
B)is very stable
C)can gain, lose, or share electrons
D)cannot form a compound
19.
A polyatomic ion is another name for a __________ ion.
A)complex
B)neutral
C)negative
D)positive
20.
A complex ion is __________.
A)only found in compounds
B)a single atom that has formed an ion
C)an ion made from a large atom
D)an ion with more than one atom