Question

What is the valency of aluminium?

• A. 2
• B. 4
• C. 8
• D. 3

Answer 1

The correct option is D 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.