Question

What is the chemical formula for the binary compound composed of li+ and o2- ions?

Answer 1

Should be Li₂O ! Hope this helped :')

Answer 2

Answer:

$Li_2O$

Explanation:

To determine the formula of a binary compound given two ions you need to have in mind that the global charges must be balanced.

In this case, that means that the positive charges of the Li atoms must equal the negative charges of de O ones. So, two Li ions neutralize one O ion:

$2 Li^+ + O^{-2} \longrightarrow Li_2O$