AP Chemistry Unit 2 Review

What type of alloy is made when the radii of the atoms are similar in size?

• interstitial

• substitutional

Which atom has the negative dipole in this molecule?

• Hydrogen

• Fluorine

• Neither

In this molecule, Carbon has a formal charge of ____ and Nitrogen has a formal charge of _____.

• 0, 0

• 1, 0

• 0, -1

• -1, 0

What type of alloy is this?

• Interstitial

• Substitutional

What is the bond angle in BF₃?

• 90

• 120

• 109.5

• 180

What is the hybridization of carbon in CH₄?

• sp³

• sp

• sp²

Why are asymmetrical molecules polar?

• Their dipoles do not cancel

• Their dipoles cancel

What is the hybridization for carbon in CO₂

• sp³

• sp

• sp²

As the electronegativity difference between 2 atoms increases, the polarity of the bond ____________________

• increases

• decreases

Count the number of sigma and pi bonds in this molecule:

• 13 sigma, 1 pi

• 14 sigma, 2 pi

• 1 sigma, 14 pi

• 2 sigma, 13 pi