Question

Fluorine and lithium react together to form lithium compound that contains `F^-` and `Li^+` ions. What is the formula of the compound formed?

Answer 1

What else but `LiF`?

Explanation:

Positive and negative ions can combine to form NEUTRAL salts. Neutrality demands a 1:1 formula for `Li^+` and `F^-`. Common salt, `NaCl`, is another example.

What salt would be formed by `Li^+` and `SO_4^(2-)"(sulfate ions)"`?