HSC Board Paper Solutions Check Your Mark

Hindi 2026 Board Solution
📅 11 Feb 2026
Solved
English 2026 Board Solution
📅 10 Feb 2026
Solved
HSC 2026 Important Questions
📅 Board 2026
IMP

Wednesday, August 1, 2012

Three elements having 7 electrons in their outermost shell.


Ans. Fluorine, Chlorine, Bromine, Iodine.