Question

The number of $p$-electrons in bromine atom is:

• A. 12
• B. 15
• C. 7
• D. 17

Answer 1

Answer: (D)

$Br(At.no=35)$
$E.C=1s^2,2s^{2}2p^6,3s^{2}3p^{6}3d^{10},4s^{2}4p^5$
$\therefore$ Br atom has $17p$-electrons.