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

Question

Provide the electron configuration of free $$Ni^{2+}$$ ion and determine the number of unpaired electrons.

Accepted Answer

[Ar]$$3d^{8}$$; 2 unpaired electrons

Answer

[Ar]$$4s^{2}$3d^{8}$$; 2 unpaired electrons

Answer

[Ar]$$4s^{2}$3d^{6}$$; 4 unpaired electrons

Answer

[Ar]$$3d^{6}$$; 4 unpaired electrons

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