Covalent Compounds Worksheet Answer Key Template (Page 2 of 2) in pdf

Covalent Compounds Worksheet Answer Key Template Page 2

Explain why ionic compounds are formed when a metal bonds with a

nonmetal but covalent compounds are formed when two nonmetals bond.

When a metal bonds with a nonmetal, electrons are transferred from

the metal to the nonmetal because metals have very low

electronegativities and nonmetals have high electronegativities.

Because nonmetals tend to have similarly high electronegativities,

neither atom can take electrons from the other, forcing them to share

electrons.

What are the shapes of the following molecules?

carbon disulfide CS

boron trifluoride BF

carbon tetrafluoride CF

What does electronegativity have to do with bond polarity?

The greater the difference in electronegativity between two

covalently bonded atoms, the more polar the bond.

Explain how hydrogen bonding takes place.

Because hydrogen has a low electronegativity, it forms polar bonds

with electronegative atoms and has a partial positive charge. When

atoms with lone pairs of electrons are nearby, they tend to donate

electron density from the lone pair toward the hydrogen to help

stabilize it. This causes the molecules to stick to one another

because of the attraction of partially positive and negative charges.

10)

Why is the bond length of nitrogen much shorter than the bond length of

chlorine?

Nitrogen, N

, has a triple bond, while chlorine, Cl

, is singly bonded.

Generally, multiple bonds are shorter than single bonds because the

atoms are held more tightly together.

11)

What is an organic compound?

Organic compounds contain carbon. Most contain hydrogen, and

many contain oxygen, nitrogen, and sulfur.

Covalent Compounds Worksheet Answer Key Template Page 2