Question
Which of the following options represents the correct bond order?
A.
$$O_2^ - > {O_2} > O_2^ + $$
B.
$$O_2^ - < {O_2} < O_2^ + $$
C.
$$O_2^ - > {O_2} < O_2^ + $$
D.
$$O_2^ - < {O_2} > O_2^ + $$
Answer :
$$O_2^ - < {O_2} < O_2^ + $$
Solution :
$$\eqalign{
& O_2^ - :B.O. = \frac{{10 - 7}}{2} = 1.5 \cr
& {O_2}:B.O. = \frac{{10 - 6}}{2} = 2 \cr
& O_2^ + :B.O. = \frac{{10 - 5}}{2} = 2.5 \cr
& {\text{The order is}}\,O_2^ - < {O_2} < O_2^ + . \cr} $$