A non metal M forms Mcl3 M205 and Mg3M2 but does not form Ml3 then what is element M
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A metal M forms an oxide having the formula M2O3.
That is the valency of metal is 3. Elements with valency 3 belongs to group IIIA (13) of the periodic table.
So,metal M belongs to group IIA and 3rd period of periodic table.Tha t means metal M is Aluminium.
The atomic number of Aluminium = 13
Electronic configuration is (2,8,3)
Valncy of Aluminium = 3
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