Question

1. What is the formal charge on each atom in OH- ?
A. O = -1, H = 0
B. O = -1, H = +1
C. O = +1, H = -1
D. O = 0, H = -1
E. O = -2, H = +1
2. Which of the following species will have a Lewis structure most like that of bromine trifluoride, BrF3 ?
a. BF3
b. CO32-
c. SO3
d. NCl3
e. none of these
3. How many electrons does a nitrogen atom need to gain to satisfy the octet rule?

Answer 1

1. A. O = -1, H = 0 
2. BrF3 Lewis structure

a. BF3

b. $CO_3^{2-}$

c. SO3

d. NCl3

Answer: e. none of these  

3.3 electrons