NZ Scholarship Chemistry Practice Questions - New Zealand Scholarship Chemistry Assessment (Standard 93102) Exam

What is the ground-state subshell electron configuration of the Cu+ ion (Z = 29)?

[Ar] 3d9 4s1 [Ar] 3d10 [Ar] 3d8 4s2 [Ar] 3d9 4s2

Correct Answer:

[Ar] 3d10

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