Question

Elements present in a group have same valency while those present in a period different valencies.Comment

Answer 1

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

Answer 2

Answer:

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