Question

Give scientific reason -
elements belonging to the same group have the same valency

Answer 1

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

Answer 2

Elements in same group show same valency because they have same number of electrons in ther outermost shell i.e. Valence shell.Since valency depends upon the valence electrons so they have same valency. Elements in the same group have same valancy. This is because the elements have same number of valance electrons.