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d and f BLOCK ELEMENTS
Question #38300
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Question
What is the electronic configuration of the Cu⁺ ion?
A. [Ar] 3d⁹
B. [Ar] 3d¹⁰
C. [Ar] 3d¹⁰ 4s¹
D. [Ar] 3d⁸ 4s²
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