Question

decreasing order of metallic character of oxygen iron and Argon​

Answer 1

Explanation:

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.