Armenia Chemistry Unified Exam Practice Questions - Unified Entrance Examination - Chemistry (Քիմիա) Exam

What is the ground-state electron configuration of the chromium atom (24_Cr)?

1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s¹ ([Ar] 3d⁵ 4s¹) 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁴ 4s² ([Ar] 3d⁴ 4s²) 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶ ([Ar] 3d⁶) 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 4p⁴

Correct Answer:

1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s¹ ([Ar] 3d⁵ 4s¹)

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