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d and f BLOCK ELEMENTS
Question #39768
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Question
What is the ground state electronic configuration of Thulium (Tm, Z=69)?
A. [Xe] 4f¹² 6s²
B. [Xe] 4f¹³ 6s²
C. [Xe] 4f¹⁴ 6s²
D. [Xe] 4f¹³ 5d¹ 6s¹
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