Which, if any, is the ground-state electron configuration for Cr³⁺ A) [Ar]3d² or 1s²2s²2p⁶3s²3p⁶3d² B) [Ar]3d⁴ or 1s²2s²2p⁶3s²3p⁶3d⁴ C) [Ar]3p³ or 1s²2s²2p⁶3s²3p³ D) [Ar]3d³ or 1s²2s²2p⁶3s²3p⁶3d³ E) None of the above

Question

Quizplus · Accepted Answer

The ground-state electron configuration for Cr is [Ar]3d^5 4s^1. For S, it is [Ne]3s^2 3p^4, and for P it is [Ne]3s^2 3p^3. Therefore, the electron configuration for Cr^{3+ will be [Ar]3d^5 4s^1 3p^4 3s^1 3p^1, and for} it will be [Ne]3s^2 3p^6. When we combine the two, we get: [Ar]3d^5 4s^1 3p^4 3s^1 3p^1 [Ne]3s^2 3p^6, which simplifies to [Ar]3d^5 4s^1 3p^4 [Ne]3s^2 3p^6. Therefore, the correct option is D.

Which, If Any, Is the Ground-State Electron Configuration for Cr3+

Which, If Any, Is the Ground-State Electron Configuration for Cr³⁺