Question

(v) Which of the following does not change along a period?

(a) Number of shells

(b) Atomic radii

(c) Metallic character

(d) Number of electrons​

Answer 1

Answer:

Valence electrons increase from left to right in a period and remain same from top to bottom in a group.

Atomic radii and metallic character increases down the group.

Answer 2

Answer:

(b)e Atomic radii

hope u understood