

InterviewSolution
Saved Bookmarks
1. |
The element with atomic number `9,17,35,53,85` are allA. noble gasesB. halogensC. heavy mentalsD. light mentals |
Answer» Correct Answer - B These atomic no. Gives the confinguration `ns^(2)np^(5)`which are of halogen group or seventeeth group. |
|