Question

The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number $16$ is:

• A. $1$
• B. $2$
• C. $3$
• D. $4$

Answer 1

Answer: (B)

$2$

Like $O_2$ molecule, sulphur (atomic number $=$ 16) exists as $S_2$ molecule in a vapour state and it is paramagnetic due to the presence of two unpaired electrons in antibonding $\pi$ molecule orbitals.

Hence, option $B$ is correct.