The net charge on a sulfide ion, S2−, is 2−. How does this ion obtain its charge?
We have to describe how the sulfide ion (S2-) gains a charge of -2.
Ions form as a result of loss or gain of electrons from neutral atoms or molecules.
Cations are positively-charged ions and form by loss of electrons.
Anions are negatively-charged ions and form by gain of electrons.