Q. The number of $p$-electrons in bromine atom is
A) 12
B) 15
C) 7
D) 17
Explanation
(d)
Br (At. no.=35)
$E.C. = 1s^{2},2s^{2}2p^{6},3s^{2}3p^{6}3d^{10},4s^{2}4p^{5}$
∴ Br atom has 17 $p$-electrons.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.