Question

Arrange the following elements in order of decreasing metallic character:
Sc, Fe, Rb, Br, O, Ca, F, Te

• A. Rb > Ca > Sc > Fe > Te > Br > O > F
• B. Ca > Rb > Sc > Fe > Br > Te > O > F
• C. Rb > Sc > Ca > Fe > Te > Br > F > O
• D. None of these

Answer 1

The correct option is A Rb > Ca > Sc > Fe > Te > Br > O > F

i) If elements belong to same group then element belonging to higher period will be more metallic due to its bigger size.
ii) If elements belongs to same period then element belonging to lower group will be more metallic because metallic nature decreases across the group.
By keeping above two things in mind the correct order will be Rb > Ca > Sc > Fe > Te > Br > O > F.