Valency of aluminium is:

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Solution

Explanation:
Atomic number of aluminium is 13 so its electronic configuration is 2, 8, 3.
Since it has 3 electrons in its valence shell, it will lose 3 electrons to complete its octet hence its valency is +3.
Hence, option (C) is correct.

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Similar questions

The valency of aluminium is 3. Write the valency of their radicals present in the following compounds.

(a) Aluminium chloride

(b) Aluminium oxide

(d) Aluminium sulphate

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