Question

All the elements of a group have the same number of valence electrons(true or false) ​

Answer 1

Answer:

false

Explanation:

valence of electrons are having different protons and electrons

Answer 2

Answer:

true

Explanation:

because additive electrons are added to same shell. for example take lithium and sodium

electronic configuration of Li is [He 2s1]

electronic configuration of Na is[Ne 3s1]

both belongs to same group since general configuration is ns1. Therefore their valence are same.