Question

What is the correct formula for Nickel (1) Sulfide

Answer 1

It's not possible but
`Ni_2S`?

Step-by-step explanation:

Nickel (i) sulfide shouldn't really be possible. Nickel doesn't exist with a +1 charge afaia so you can't combine it with sulfur to make this molecule. You need a positive nickel ion to bond with the negative sulfur ion.

Theoretically if
`Ni^1^+` existed, this nickel (i) sulfide molecule would be
`Ni_2S`

You just swap charges of
`S^2^-` and
`Ni^1^+`

But this is a really unusual question. I would ask your teacher about it maybe?