The valency of aluminium is :

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Solution

The correct option is C 3
The atomic number of aluminium is 13. So, the electronic configuration is 2, 8, 3. It loses 3 electrons and form $A l^{3 +}$ ion, therefore it has a valency of 3.

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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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