Which one of the following does not increase while moving down the group of the periodic table ?

Which one of the following does not increase while moving down a group of the periodic table?

On moving down a group of the periodic table,

Which of the following remains constant while moving down the group of the periodic table? *

Which of the following remains constant while moving down the group of the periodic table? (a) Atomic radius (b) Metallic character (c) Number of shells in the atom (d) Valence electrons H

Which of the following property increases as we go down the group in the periodic property?

Ionisation energy increases on moving down a group in the periodic table.

Which one of the following elements does not belong to group 14 of the periodic table ?

Which of the following properties increases on going down from F to I in group 17 of the periodic table ?