What is the valency of aluminium?

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Solution

The correct option is A 3
Valency is the combining capacity of an atom. It depends on the no. of valence electrons.
Atomic number. of aluminium is 13. Thus, it contains 13 protons and 13 electrons.
Electronic configuration of aluminium (Al) is 2,8,3.
Valency = no. of valence electrons (n), if n<4.
Thus, valency of aluminum is 3.

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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

Find the valency and valence electrons in Aluminium (Atomic number =13)

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