Which of the following may represent an excited-state electron configuration for a cobalt atom?
A) [Ar]3d54s1
B) [Ar]3d64s2
C) [Ar]3d84s1
D) [Ar]3d64s1
E) [Ar]3d74s2
Correct Answer:
Verified
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A)Br:[Ar]3d104s24p5
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E)Zn:[Ar]3d104s2
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