Atoms of seven elements A, B, C, D, E, F, and Ghave different number of electron shells but have the same number of electrons in the outermost shells. How do the following properties vary as we move from A to G? (i) Metallic character (ii) Atomic radii (iii) Valency?

Explanation

Since the elements have the same number of electrons in their outermost shells, all of them lie in the same group. Hence, as we move down a group, i.e., as we move from A to G:
i] metallic character increases
ii] atomic radii increases
iii] valency remains the same