Question

What is the simplest formula for copper (II) and nitride?

Answer 1

`Cu_"3"N_"2"`

Explanation:

The easiest way of thinking about the combination of ions is by using the method I recall as being called , "the swap and drop"

So we have two ions,

`Cu^(2+)` and `N^(3-)`

now we swap the charge of each and drop, Note that the two ions have to be of opposite charge.

`Cu_"3"` and `N_2`

Now combine,

`Cu_"3"N_"2"`

This is the simplest formula.