Covalent Bonding Answers

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21
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How many valence electrons are available for bonding in bromine (Br)?

A
one
B
two
C
five
D
seven
22
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How many valence electrons are available for bonding in silicon?

A
four
B
five
C
eight
D
fourteen
23

Which compound contains only a nonpolar covalent molecule?

A
O2
B
HCl
C
H2O
D
NO3
24

Some atoms are exceptions to the octet rule by having an expanded octet. Which characteristic is needed for an atom to have an expanded octet?

A
The atom has empty d-orbitals.
B
The atom has more than eight valence electrons before bonding.
C
The atom has empty p-orbitals.
D
The atom has fewer than eight valence electrons after bonding.

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