Question

Oxygen molecule is paramagnetic in nature. What is the paramagnetic content in terms of magnetic moment in $O_{2}^{-}$?

• A. $1.732$
• B. 3
• C. $1.5$
• D. $2.5$

Answer 1

Answer: (A)

$1.732$

Answer 2

: $O_{2}^{-}:(\sigma 1s^{2})(\sigma*1s^{2})(\sigma 2s^{2})(\sigma*2s^{2})(\sigma 2p_{z}^{2})$

$(\pi 2p_{x}^{2} = \pi 2p_{y}^{2})(\pi*2p_{x}^{2} = \pi*2p_{y}^{1})$

$O_{2}^{-}$has 1 unpaired electron.

$\mu = \sqrt{n(n + 2)} = \sqrt{1(1 + 2)} = \sqrt{3} = 1.732B.M.$