Canary Islands PAU Chemistry Practice Questions - Canary Islands PAU Chemistry Examination 2026 (Química 2o Bachillerato COPAU) Exam

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

[Ar] 4s⁰ 3d⁶ [Ar] 4s² 3d⁴ [Ar] 4s¹ 3d⁵ [Ar] 4s² 3d⁵

Correct Answer:

[Ar] 4s¹ 3d⁵

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