Question

Choose the ground state electron configuration for Zn2⁺.

A) [Ar]4s23d8

B) [Ar]3d10

C) [Ar]4s23d6

D) [Ar]

E) [Ar]3d8

Choose the ground state electron configuration for Zn2⁺.

A) [Ar]4s23d8

B) [Ar]3d10

C) [Ar]4s23d6

D) [Ar]

E) [Ar]3d8

Answer 1

Number of electron in Zn = 30

Electronic configuration is 1s2 2s2 2p6 3s2 3p6 3d10 4s2

Since charge on Zn is +2

So, we need to remove 2 electrons

Electrons are always removed from highest number orbital

Removing 2 electron from 4s

Final electronic configuration is : 1s2 2s2 2p6 3s2 3p6 3d10

Noble gas having lesser electron than Zn and closest to it is Argon (Ar)

Number of electron in Ar = 18

electronic configuration of Ar is: 1s2 2s2 2p6 3s2 3p6

So, electronic configuration of Zn in noble gas form is: [Ar] 3d10

Answer: B