Angola 12th Grade Chemistry National Exam Practice Questions - Angola 12th Grade National Examination - Chemistry (Exame Nacional De Química 12.a Classe - INADE MED) Exam

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

[Ar] 4s1 3d5 [Ar] 4s2 3d4 [Ar] 3d6 [Ar] 4s2 4p4

Correct Answer:

[Ar] 4s1 3d5

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