Question

Oxygen molecule is

• A. non-magnetic
• B. diamagnetic
• C. paramagnetic
• D. ferromagnetic

Answer 1

Answer: (C)

paramagnetic

Answer 2

$\sigma 1s^{2}, \sigma^* 1s^{2},\sigma 2s^{2},\sigma^* 2s^{2}, \sigma 2p^{2}_{z} ,\left(\pi2p_{x}^{2} =\pi2p_{y}^{2}\right)\left(\pi^* 2p_{x}^{1} =\pi^ 2p_{y}^{1}\right)$ Because of two unpaired electrons in antibonding molecular orbitals $O_2$. is paramagnetic.