Which one of the following ions has electronic configuration [.Ar].3d6 ? (At. nos. Mn = 25, Fe = 26, Co = 27, Ni = 28)

Question

Which one of the following ions has electronic configuration [.Ar].3d6 ? (At. nos. Mn = 25, Fe = 26, Co = 27, Ni = 28) (A) Co3 + (B) Ni3 + (C) Mn3 + (D) Fe3 +

Tardigrade Admin · Accepted Answer

In case of Co+ 3[.Ar].3d6 configuration is possible 27Co arrow [.Ar].3d74s2 On removing 3e- we get Co3 + arrow [.Ar].3d6

Q. Which one of the following ions has electronic configuration $[A r] 3 d^{6}$ ?
(At. nos. Mn = 25, Fe = 26, Co = 27, Ni = 28)

$C o^{3 +}$

$N i^{3 +}$

$M n^{3 +}$

$F e^{3 +}$

In case of $C o^{+ 3} [A r] 3 d^{6}$ configuration is possible $_{27} C o \to [A r] 3 d^{7} 4 s^{2}$
On removing $3 e^{-}$ we get $C o^{3 +} \to [A r] 3 d^{6}$

Q. Which one of the following ions has electronic configuration [Ar]3d6 ? (At. nos. Mn = 25, Fe = 26, Co = 27, Ni = 28)

Co3+

Ni3+

Mn3+

Fe3+