Question

state the type of substance and the oxidation state of a calcium ion.

cation +1 charge
cation +2 charge
anion -1 charge
anion -2 charge

Explanation:

Calcium (Ca) is an alkaline earth metal. In its ionic form, a calcium ion ($Ca^{2+}$) is a cation (positively charged ion) because it loses 2 electrons. The oxidation state (charge) of a calcium ion is +2. So the correct option is the one labeled "cation +2 charge".

Answer:

cation +2 charge