Question

Elements In The Same Group Have Equal Valency Comment On It

Answer 1

Valency is defined as the number of electrons lose or gained by an atom to attain a noble gas configuration.

• Elements in the same group show the same valency because they have the same number of electrons in the outermost shell i.e. Valence shell.
• Since valency depends upon the valence electrons so they have the same valency.

Examples:

• Valency of the first group element (alkali metal) is one.
• The valency of a second group ( alkaline earth metal) element is two.