Answers

2016-03-18T20:31:30+05:30
M2O3 depicts that valency of M is 3
it forms M2 (SO4)3 with sulphate and MBr3 with Bromine.
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2016-03-18T20:32:09+05:30

Aluminium.

Valency - 3

 Al2(SO4)3

AlBr3

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