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d and f BLOCK ELEMENTS
Question #38332
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Question
What is the electronic configuration of the ground state of Ruthenium (Ru, Z=44)?
A. [Kr] 4d⁶ 5s²
B. [Kr] 4d⁸
C. [Kr] 4d⁷ 5s¹
D. [Kr] 4d⁵ 5s³
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