Question

What is the formula for rubidium nitride?

Answer 1

Well, `"rubidium"` is an alkali metal.....

Explanation:

...that forms a `Rb^+` cation....and nitrogen forms a nitride ion....`N^(3-)`

`1/2N_2+3e^(-) rarr N^(3-)`

....and thus we form a `Rb_3N` salt when the ions make music together....and this is probably not something we could put into a bottle.....