Question

What is the ion notation for Calcium that lost 2 electrons?

Answer 1

`Ca^(2+)`

Explanation:

And thus calcium forms 1:1 salts with doubly negative ions, `CaCO_3`, `CaSO_4`, `CaHPO_4` etc., and 1:2 salts with negative ions: `CaI_2`, `Ca(NO_3)_2`.