Question

What is the formula for lithium sulfide?

Answer 1

`Li_2S`

Explanation:

Lithium is a Group 1 metal .... it commonly forms a `Li^+` ion... Sulfur is a Group 16 non-metal...upon reduction it commonly forms a `S^(2-)` ion...

And so when we make the NEUTRAL SALT we gets...

`S^(2-)+2xxLi^+ -=Li_2S`