How Many Unpaired Electrons Does an Atom of Sulfur Have?

An atom of sulfur has 2 unpaired electrons.

Here’s the explanation:

Sulfur (S) is an element with an atomic number of 16. Its electron configuration is 1s² 2s² 2p⁶ 3s² 3p⁴. In the 3p subshell, there are four electrons. According to Hund’s rule, electrons will fill orbitals singly before pairing up. Therefore, in the 3p subshell, there are three orbitals, and the four electrons will occupy them as follows: one electron in each of the three orbitals and one additional electron in one of the orbitals, resulting in two unpaired electrons.

So, the correct answer is c) 2.