Question

The number of d - electrons in $F{e}^{2+}$ (Z = 26) is not equal to the number of electrons in which one of the following ?

• A. P- electrons in Ne (Z = 10)
• B. s-electrons in Mg (Z = 12)
• C. p- electrons in Cl (Z = 17)
• D. s - electrons in Fe (Z = 26)

Answer 1

The correct option is C

p- electrons in Cl (Z = 17)

Atomic number of chlorine = 17 $Cl-1s^{2}2s^{2}2p^{6}3s^{2}3p^5$

$F{e}^{2+}-3d^6$