Question

The ground state configuration of $Fe^{3+}$ ion in gaseous state is : (At.No. of Fe = 26)

• A. $[Ar]^{18}\,3a^3\,4s^2$
• B. $[Ar]^{18}\,3d^6\,4s^2$
• C. $[Ar]^{18}\,3d^5$
• D. $[Ar]^{18}\,3d^2$

Answer 1

Answer: (C)

$[Ar]^{18}\,3d^5$

Answer 2

$Fe (Z = 26) : [Ar]^{18} 3d^5$