Question

what is the periodic trend in the variation of valency while going down a group explain your answer with reference to group 1 2 and 3​

Answer 1

Answer:

☆The valency of an element is determined by the number of valence electrons in the outermost shell of an atom of an element.

☆ the elements in a group have the same number of valence elements.

☆Therefore elements in the same group should have the same valency.

@YogitaChaudhary