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d and f BLOCK ELEMENTS
Question #38351
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Question
What is the ground state electronic configuration of Iron (Fe, Z=26)?
A. [Ar] 3d⁸
B. [Ar] 3d⁵ 4s³
C. [Ar] 3d⁷ 4s¹
D. [Ar] 3d⁶ 4s²
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