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d and f BLOCK ELEMENTS
Question #38352
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What is the ground state electronic configuration of Cobalt (Co, Z=27)?
A. [Ar] 3d⁹
B. [Ar] 3d⁶ 4s³
C. [Ar] 3d⁸ 4s¹
D. [Ar] 3d⁷ 4s²
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