According to the Periodic Table the ion with 28 protons and 30 electrons, the chemical sybol is Ni-58
The chemical symbol is Cu2+.
Cl-
The symbol for this ion is As3-. The charge is 3- because there are three more electrons than protons.
Co 2+
the chemical symbol for boron ion is B+++
Magnesium, with a +2 charge.
the chemical symbol for boron ion is B+++
It would end up answering with Cobalt = Co. Because the protons stay the same and add the protons and electrons together equaling 59. So (Co+2) would be the final answer.
Al3+ ion
17O2-
K
This ion has 16 protons and 18 electrons.