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A Metal M Forms as Oxide Having the Formula M_2o_3. It Belongs to Third Period. Write the Atomic Number and Valency of the Metal. - Chemistry

Course
ConceptPeriodic Properties and Variations of Properties:- Physical and Chemical

Question

A metal M forms as oxide having the formula M_2O_3. It belongs to third period. Write the atomic number and valency of the metal.

Solution

Period no. = no. of shells, so n = 3
From the formula M_2O_3 its valency is 3.
Since it is a metal, its valence shell has 3 electrons.
So its electronic configuration is 2, 8, 3
Atomic number =13
Hence the metal is Aluminum with valency 3.

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Solution A Metal M Forms as Oxide Having the Formula M_2o_3. It Belongs to Third Period. Write the Atomic Number and Valency of the Metal. Concept: Periodic Properties and Variations of Properties:- Physical and Chemical.
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