Question

Valencies of group 1and2

Answer 1

Hi friend here is your answer

The valency of an element is determined by the number of outer shell (valence) electrons.

Elements are placed in groups (columns) in the periodic table according to the number of valence electrons, so naturally the position of the element in the periodic table should give us an idea of its valency.

All elements in group 1 have 1 valence electron so they have a valency of +1 as they will tend to give up 1 electron.

This is the same for group 2 which will give up two electrons

Hope it helps you.........!!

Answer 2

Answer:

Valency of Group 1 is 1.

Valency of Group 2 is 2.