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d and f BLOCK ELEMENTS
Question #38280
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Question
What is the electronic configuration of the element with atomic number 27?
A. [Ar] 3d⁶ 4s²
B. [Ar] 3d⁷ 4s²
C. [Ar] 3d⁸ 4s¹
D. [Ar] 3d⁷ 4s¹
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