Question

What is the net charge of the elements Ni, I and Au on the periodic table?

Answer 1

Matter of course is electrically neutral. For every positive charge, there is a corresponding negative charge. To be sure, elements CAN FORM ions, by the loss or gain of electrons. Metals tend to lose electrons to form cations, and non-metals (to the right of the Periodic Table) tend to gain electrons to form anions.
Common ions of the given elements are $N{i}^{2+},I^{-}$ and $A{u}^{+}$ and $A{u}^{3+}$ you can supply the net charge on each .
Why can't an element lose a positive charge (i.e. a nuclear proton) to form a negative ion?