CAPE Chemistry Unit 1 Practice Questions - CAPE Chemistry Unit 1 (Caribbean Examinations Council, CXC) Exam

What is the ground-state electron configuration of a chromium atom (Z = 24)?

1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁴ 4s² 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s¹ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 4p⁴ 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶

Correct Answer:

1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁵ 4s¹

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