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d and f BLOCK ELEMENTS
Question #38341
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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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