Chemistry
A metal M forms an oxide having the formula M2O3. It belongs to third period. Write the atomic number and valency of the metal.
Periodic Table
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Answer
The metal is Aluminium. Its
Atomic Number = 13,
Valency = 3.
Valency of O is 2 so valency of M is 3. Therefore, M belongs to 13th group. It is given that M belongs to 3rd period, hence, it has atomic number 13.
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