3-7-1. Which of the Lewis structures shown below for azide ion (N3-) has a nitrogen atom with a formal charge of -2?
A. Structure I only
B. Structure II only
C. Both structures
D. neither structure
3-7-2. Which of the Lewis structures shown below has zero formal charges for all the atoms?
A. Structure I
B. Structure II
C. Structures III
D. Structure IV
3-7-JJW. What are the formal charges on the O,N, and O in the nitrite ion?
A. -1, +1, -1
B. 0, -1, 0
C. -1, 0, 0
D. -1, -1, +1
3-7-ALD. What is the formal charge of N in the NO3- ion?
A. +1
B. +5
C. -1
D. 0
