MHT CET 2024 Chemistry question
Which from following elements has completely filled 4f orbital at expected ground state configuration?
Answer: (B)
Solution
A completely filled 4f subshell holds 14 electrons (). Yb (Z = 70): , so 4f is full, and this is the lanthanide the question intends. Eu (Z = 63): , only half-filled 4f. Cd (Z = 48): , it
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