Question

On moving down a group, the number of valence electrons ______. (remains the same/increases/decreases).

Answer 1

On moving down a group, the number of valence electrons remains the same.

Explanation:

As you move down a group, each consecutive element adds a new filled inner electron shell. However, the number of electrons in the outermost shell stays identical for all elements in that specific vertical column. For example, all Group 1 elements (like Lithium and Sodium) consistently maintain exactly one valence electron.