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d and f BLOCK ELEMENTS
Question #38299
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Question
What is the electronic configuration of the Fe²⁺ ion?
A. [Ar] 3d⁶
B. [Ar] 3d⁶ 4s²
C. [Ar] 3d⁵ 4s¹
D. [Ar] 3d⁴ 4s²
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