Question

For each of the three ionic compounds, select which main group X belongs to.
(a) X3PO4 (b) CaX2 (c) X2(SO4)3
Group 1A (1) Group 1A (1) Group 1A (1)
Group 2A (2) Group 2A (2) Group 2A (2)
Group 3A (13) Group 3A (13) Group 3A (13)
Group 4A (14) Group 4A (14) Group 4A (14)
Group 5A (15) Group 5A (15) Group 5A (15)
Group 6A (16) Group 6A (16) Group 6A (16
Group 7A (17) Group 7A (17) Group 7A (17)
Group 8A (18) Group 8A (18) Group 8A (18)

Answer 1

do you know how to determine oxidation states?