Answer:
Cl-
Ca2+
Explanation:
An ion is a charged atom or group of atoms. An ion may be formed from an atom or from a molecule.
When an ion is formed from an atom, the atom now has either an excess or an insufficient number of electrons. This will lead to the development of a negative or positive charge in the atom as the case may be.
Cl- and Ca2+ are two ions formed from atoms, the first one has an excess of one electron while the other have lost two electrons
