Question

Atomic size of the elements
……………. across the period but ……………. down the group. Metallic character ……………. across the period
but non-metallic character ……………. Number of valence electrons ……………. across the period and the
valency ……………. but valency of the elements is ……………. in a group. All the properties of elements are
the Periodic function of their …………….

Answer 1

Answer:

A

nitrogen

B

oxygen

C

chlorine

D

fluorine

Answer

D