What would the molecular formula be if lithium and sulfur reacted to form a neutral compound?

A. LiS

B. LiS2

C. Li2S2

D. Li2S

D, Li2S

Explanation:

This is because Lithium, which is in group IA of the periodic table, has a charge of + 1. Sulfur will have a charge of - 2 because it is in group 6A in the periodic table, which means to balance these out, there needs to be 2 lithium ions which would result in a charge of + 2. With Lithium now having a charge of + 2 due to having two atoms in the compound, and sulfur already having a charge of - 2 as one atom, these two cancel out meaning the compound is neutral.