The usual formal charge for lithium is +1, and one of the common valences for sulfur is -2, so yes, that would be a valid formula.
The formula for lithium sulphide is Li2S.
The formula is: Li2S the "2" is a subscript
Li2S
Lithium (Li) reacts with sulfur (S) to produce lithium sulfide Li2S.
Li2S
Li2S
The chemical formula for sulfur is S, and for lithium it is Li.
Lithium combines with sulphur to form lithium sulphide (Li2S)
Lithium sulfate - Li2SO4 Lithium sulphide - Li2S
Li2s
The chemical formula for lithium is Li. The chemical formula for sulfide ion is S2-. Therefore, the chemical formula for lithium sulfide would be Li2S.
The gram formula mass of Li2S is calculated by adding the atomic masses of lithium (Li) and sulfur (S) in one formula unit of Li2S. The atomic mass of Li is approximately 6.94 g/mol and the atomic mass of S is approximately 32.07 g/mol. Therefore, the gram formula mass of Li2S is 6.94 (2 Li atoms) + 32.07 (1 S atom) = 46.95 g/mol.