Question

Electron configuration

The magnetic behavior of an atom or ion depends on its electron configuration.

Part A

Select the correct electron configurations from the list below. You can refer to the periodic table for atomic numbers.

Check all that apply.

A) The electron configuration of Rb is [Kr]5s^04d^1.

B) The electron configuration of C is [He]2s^22p^2.

C) The electron configuration of S2− is [Ne]3s^23p^6.

D) The electron configuration of Fe is [Ar]4s^23d^6.

E) The electron configuration of Au+ is [Xe]4f^145d^96s^1.

Answer 1

Ans - A) for Rb electron configration is [Kr] 5s¹ (1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶5s¹)

B) for C electron configration is [He] 2s²2p² ( 1s²2s²2p²)

C) for S-2 electron configration is [Ne] 3s² 3p⁶ (1s² 2s² 2p⁶ 3s² 3p⁶)

D) for Fe electron configration is [Ar] 3d⁶4s² (1s²2s²2p⁶3s²3p⁶3d⁶4s²)

E) foe Au⁺ electron configration is Xe] 6s² 4f¹⁴5d⁸

so According to the above correct configration only option B, C and D matches to the given configration, hence only B, C and D are correct