Section 8.1
Forming Chemical Bonds
Practice Test
1.
Which of these is the electron configuration of an atom most likely to lose an electron?
a.
1s
2
2s
2
2p
6
b.
[He]2s
2
2p
5
c.
1s
2
2s
2
2p
6
3s
2
3p
5
d.
1s
2
2s
2
2p
6
3s
2
3p
6
4s
1
Hint
2.
Which of these is the electron configuration of an atom most likely to gain an electron?
a.
1s
2
2s
2
2p
6
b.
1s
2
2s
2
2p
6
3s
1
c.
1s
2
2s
2
2p
6
3s
2
3p
5
d.
1s
2
2s
2
2p
6
3s
2
3p
6
4s
1
Hint
3.
_____________ is the force that holds two atoms together.
a.
A chemical bond
b.
Glue
c.
Nuclear force
d.
Fission
Hint
4.
What forms chemical bonds?
a.
atomic nuclei
b.
valence electrons
c.
inner-level electrons
d.
noble gases
Hint
5.
A positive ion forms when ___________.
a.
an atom loses one or more valence electrons
b.
an atom gains one or more valence electrons
c.
electrons are pulled into the nucleus
d.
electrons are pushed out of the nucleus
Hint
6.
What is a negatively charged ion called?
a.
nucleus
b.
cation
c.
anion
d.
molecule
Hint
7.
How many electrons are present in the valence level for all noble gases except helium?
a.
6
b.
7
c.
8
d.
9
Hint
8.
Why is the calcium ion (Ca
2+
) more stable than the calcium atom (Ca)?
a.
Twenty electrons are more stable than eighteen electrons.
b.
Eighteen electrons are less stable than twenty electrons.
c.
The two electrons more than the noble gas configuration is more stable.
d.
The noble gas configuration is more stable.
Hint
9.
Which elements can either gain or lose electrons to form stable octets?
a.
metals
b.
metalloids
c.
nonmetals
d.
transition metals
Hint
