# What charge does calcium, Ca, have when it becomes an ion?

Jun 4, 2018

A $+ 2$ oxidation state, typically.

#### Explanation:

$\text{Ca}$ generally loses two electrons from its outer shell to form a ${\text{Ca}}^{2 +}$ ion.

Charge on ${\text{Ca}}^{2 +}$ ion is

$\text{q" = 2 cancel"positive charges" × (1.602 × 10^-19\ "C")/cancel"proton" = 3.214 × 10^-19\ "C}$