Question

Which of the following have equal valencies
numerically?
Boron
Nitrogen
Neon
Aluminium
​

Answer 1

Boron has electronic configuration of (2,3), valency= +3

Nitrogen has electronic configuration of (2,5), valency= -3

Aluminium has electronic configuration of (2,8,3), valency= +3

Hence, Boron, Nitrogen and Aluminium have equal valencies of 3 numerically.

Answer 2

Answer:

1. boron
2. nitrogen
3. aluminum

has same valency 3

and

neon has 0