AP Chemistry Unit 4 Bonding Review

Which of these molecules could best be represented by the ball-and-stick model shown?

• BeH₂

• CO₂

• H₂O

• SO₂

Which of the following substances contains both ionic and

covalent bonds?

• NH₃

• CH₄

• NaOH

• C₂H₅OH

What type of bonding is found within a water molecule?

• ionic bonding

• polar covalent bonding

• nonpolar covalent bonding

• hydrogen bonding

Dinitrogen monoxide, N₂0, has two double bonds. The general structure is N=N=O. What is the formal charge on the oxygen atom in this molecule?

• zero

• positive one (+1)

• positive two (+2)

• negative one (-1)

Tags

NGSS.HS-PS1-3

The Lewis structure of which compound is best represented with resonance structures?

• MgCl₂

• CO₂

• SO₃ ^2-

• OCl₂

The molecule shown above represents alanine, one of the simplest amino acids. This amino acid is considered nonessential to the human diet as it can be synthesized in the body from other compounds.

Which statement is correct concerning alanine?

• Each carbon atom is sp³ hybridized.

• The hybridization of the nitrogen atom is sp².

• All bond angles are approximately 109.50.

• The molecule contains 12 sigma and 6 pi bonds.

Tags

NGSS.HS-LS1-6

How many unbonded pairs of electrons are found on the alanine molecule?

• 0

• 1

• 3

• 5

How many of the following molecules have a measurable dipole moment?

S0₃ CCl₄ PF₃ BH₃

• 1

• 2

• 3

• 4

Which best describes the bonding in the cyanide ion (CN^-)?

• 3 (sigma) bonds

• 2 (sigma) bonds and I (pi) bond

• 1 (sigma) bond and 2 (pi) bonds

• 3 (pi) bonds

Which is correct for the hybridization and molecular geometry of phosphorus tribromide?

• sp³, tetrahedral

• sp³, trigonal pyramidal

• sp², trigonal pyramidal

• sp², trigonal planar