For each of the following compounds and ions,
1. Draw a Lewis structure.
2. Show the kinds of orbitals that overlap to form each bond.
3. Give approximate bond angles around each atom except hydrogen.
a. [NH₂]^–

Describe the orbitals used in bonding and the bond angles in the following compounds:

d. N₂

Predict the approximate bond angles for

c. the H—C—N bond angle in (CH₃)₂NH.

d. the H—C—O bond angle in CH₃OCH₃

Predict the approximate bond angles:

c. the C—N—H bond angle in (CH₃)₂NH

d. the C—N—C bond angle in (CH₃)₂NH

Use your molecular models to make ethane, and compare the model with the preceding structures.

For each of the given species:

a. Draw its Lewis structure.

b. Describe the orbitals used by each carbon atom in bonding and indicate the approximate bond angles.

3. CCl₄

Predict the hybridization of the oxygen atom in water, H₂O. Draw a picture of its three-dimensional structure, and explain why its bond angle is 104.5°.

What is the molecular geometry predicted around the indicated carbon atom that is part of the double bond in $\mathrm{cyclohexene}$?

Which of the following factors primarily determine the geometry of a molecule?