Question

Give the formula of an ionic compound formed by an element in group 2 and show the charge on each ion.?

Answer 1

`CaX_2`; `CaCO_3`; `BaSO_4`.....

Explanation:

A Group 2 metal has the two valence electrons and it is oxidized to form a dication....

`M_"Group 2"+Delta rarrM^(2+) + 2e^(-)`

And these form NEUTRAL salts with dianions....typically sulfate or carbonate...for example....

`Ca^(2+) + SO_4^(2-) rarr CaSO_4(s)darr`

`Ca^(2+) + CO_3^(2-) rarr CaCO_3(s)darr`

Calcium sulfate and carbonate are pretty insoluble in aqueous solution....a soluble salt is the nitrate....

`Ca(NO_3)_2(s)stackrel(H_2O)rightleftharpoonsCa^(2+) + SO_4^(2-)`