provide-the-electron-configuration-of-free-ni2-ion-and-determine-the-number-of-u

Question

Provide the electron configuration of free Ni²⁺ ion and determine the number of unpaired electrons.

Accepted Answer

[Ar]3d⁸; 2 unpaired electrons

Answer

[Ar]4s²3d⁸; 2 unpaired electrons

Answer

[Ar]4s²3d⁶; 4 unpaired electrons

Answer

[Ar]3d⁶; 4 unpaired electrons