Question

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

Answer 1

A `+2` oxidation state, typically.

Explanation:

`"Ca"` generally loses two electrons from its outer shell to form a `"Ca"^(2+)` ion.

Charge on `"Ca"^(2+)` ion is

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