Question

names, symbols,valency of modern preordic table

Answer 1

Hello,

Here we go,

The answer is given in the attachment.

With the help of atomic number as well as group number you can find the valency of the element.

for example group 1A humans are having valency 1 group 2A are having valency to group 3A elements having valency 3 group 4 a element having valency 4

I hope my answer will help you