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15 June, 21:11

In the formula X2 (SO4) 3, the X represents a metal. This metal could be located on the

Periodic Table in

(1) Group 1 (3) Group 13

(2) Group 2 (4) Group 14

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  1. 15 June, 21:36
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    (3) because the 3 on the outside of the sulfate ion tells you that the first element has 3 valence electrons.
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