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

Elements	A	B	C
m.p.	63.0	180.0	97.0

State :

(i) Whether these elements belong to same group or period.

(ii) Arrange them in order of increasing metallic character.

(i) They belong to the same group as they have same number of electrons in their valence shell.

(ii) As m.p. decrease on going down the group, and metallic character increases on going down the group. Therefore,

B < C < A.