What is the electronic configuration of the ground state of Actinium (Ac, Z=89)? - d and f BLOCK ELEMENTS Quiz | GKFix.in

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Question

What is the electronic configuration of the ground state of Actinium (Ac, Z=89)?

A. [Rn] 5f¹ 7s²
B. [Rn] 6d² 7s¹
C. [Rn] 6d⁰ 7s³
D. [Rn] 6d¹ 7s²

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