Explanation:
It is known that upon losing an electron an atom tends to obtain a positive charge. Whereas upon gaining an electron an atom tends to obtain a negative charge.
Atomic number of sulfur is 16 and its electronic configuration is [tex]1s^{2}2s^{2}2p^{6}3s^{2}3p^{4}[/tex].
So, when a sulfur atom lose two electrons per atom then it will acquire a +2 net ion charge.
