What is the charge of nickel?

In a neutral atom of nickel (Ni28) has 28 electrons. These 28 electrons each have a charge of -1, and that makes a total electron charge of -28.

For the charge in coulombs, take the charge of one electron, which is -1.602 × 10-19 coulombs and multiply it by 28.

This isn't right because you have to account for the protons in the nucleus of the atom. It should be zero. I think what your looking for is its ionization charge, which I don't know off the top of my head