Atomic Structure Question 344
Question: The number of $ d $ electrons in $ F{e^{+2}} $ (atomic number of $ Fe=26 $ ) is not equal to that of the [MNR 1993]
Options:
A) $ p $ -electrons in $ Ne $ (At. No.= 10)
B) $ s $ -electrons in $ Mg $ (At. No.= 12)
C) $ d $ -electrons in $ Fe $
D) $ p $ -electrons in $ C{l^{-}} $ (At. No. of $ Cl $ = 17)
Show Answer
Answer:
Correct Answer: D
Solution:
$ _{26}Fe=[Ar],3d^{6},,4s^{2} $
$ F{e^{2+}}=[Ar],3d^{6},,4s^{0} $ Number of d-electrons = 6 $ _{17}Cl=[Ne],3s^{2},,3p^{5} $
$ C{l^{-}}=[Ne],3s^{2},,3p^{6} $ Number of p-electrons = 6.
