NCEA L3 Chemistry Practice Questions - NCEA Level 3 Chemistry (New Zealand, Year 13) Exam

What is the ground-state electron configuration of the chromium(III) ion, Cr3+ (Z = 24)?

[Ar] 3d3 [Ar] 3d1 4s2 [Ar] 3d4 4s1 [Ar] 3d2 4s1

Correct Answer:

[Ar] 3d3

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