Question

The given table shows elements with the same number of electrons in its valence shell.

Elements	A	B	C
m.p.	63.0	180.0	97.0

State:

1. Whether these elements belong to same group or period.
2. Arrange them in order of increasing metallic character.

Answer 1

1. Yes, these elements belong to the same group but are not from the same period as these elements have the same number of electrons in their valence shell.
2. B < C < A
   The metallic character increases as m.p. 180.0 > 97.0 > 63.0 decreases.