Question

5. Lithium nitride has the chemical formula `Li_3N`. Rubidium is in the same chemical family as lithium. What is the formula of rubidium nitride?

Answer 1

We would assume `Rb_3N`.

Explanation:

Rubidium, an alkali metal, commonly forms `Rb^+` salts, just as lithium commonly forms `Li^+` salts. We would assume that the formula of rubidium nitride (if it exists!) is `Rb_3N`.