Bonding Patterns

Question 1

Nitrogen

Answer 1

H
CNO
PS
Neutral
When neutral, nitrogen typically forms three bonds and has one lone pair of electrons. For example, in ammonia, nitrogen forms three single bonds.
Positive charge
When nitrogen has a positive charge, it can form four bonds and has no unshared electrons. Nitrogen with a positive charge still has a full octet.
Negative charge
When nitrogen has a negative charge, it can form two bonds and has two unshared electron pairs. For example, nitrogen can form amide anions, NH2-1, with two lone pairs on the N.