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Question
The observed electronic configuration of promethium (atomic number 61) is ____________.
Options
[Xe] 4f7 5d1 6s2
[Xe] 4f7 6s2
[Xe] 4f5 6s2
[Xe] 4f6 6s2
MCQ
Fill in the Blanks
Solution
The observed electronic configuration of promethium (atomic number 61) is [Xe] 4f5 6s2.
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Properties of Lanthanoids
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