Covalent Bonding

Covalent bonds occur between which two types of atoms?

• Metal and metal

• nonmetal and nonmetal

• metalloid and metal

• nonmetal and metal

Energy is ______________ when a covalent bond forms and is ______________ when a covalent bond breaks.

• released; required

• released; released

• required; required

• required; released

How many electrons groups are around the carbon?

• 1

• 2

• 3

• 4

The H-O-N bond angle is ______________ the O-N-O bond angle.

• smaller than

• larger than

• the same as

How many valence electrons are allowed to be in a molecule of C₂H₄Cl₂?

• 8

• 20

• 24

• 26

The total number of atoms in a tetrahedrally-shaped molecule is _____.

• 3

• 4

• 5

• 6

What is the shape of CH₂F₂?

• linear

• tetrahedral

• trigonal planar

• trigonal pyramidal

Which of the following molecules has a bent shape? You may have to draw a Lewis dot structure.

• CO₂

• NOH

• BH₃

• Br₂

Each O-F bond is ___________. As a result, the F atoms have a ___________________ and the O atom has a ____________________.

• polar; partial negative; partial positive

• polar; partial positive; partial negative

• nonpolar; partial negative; partial positive

• nonpolar; partial positive; partial negative

In a molecule of nitrogen, N₂, the nitrogen atoms are bonded to each other by

• a polar covalent bond

• a nonpolar triple bond

• a nonpolar double bond

• a nonpolar single bond