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A metal (M) forms an oxide having the formula M2O3.It belongs to third period. Write the atomic number and valency of the metal.
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8
Answer:
since the element belongs to third period it means it has three shells.
and since the valency of oxygen is 2 means the valency of the atom will be 3.
therefore its electronic configuration will be 2,8,3
its atomic number will be 13
and the element is Aluminium
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Anonymous:
(O_O)
Answered by
5
Answer:
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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