Question

The valencies of aluminium and chlorine in the compound $AlC{l}_3$ are ______ and _____ respectively.

• A. 1, 3
• B. 3, 1
• C. 1, 1
• D. 3, 3

Answer 1

The correct option is B

3, 1

The valencies of aluminium and chlorine in the compound $AlC{l}_3$ are 3,1 respectively. Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency. The valency of an element is related to how many electrons are present in the outermost shell.