Why are the expected and observed ground state electronic configuratio – InterviewSolution

1.	Why are the expected and observed ground state electronic configurations of gadolinium and lawrencium same?
Answer» The degenerate orbitals like 4f and 5f acquire extra stability when they are half filled (4f⁷) or completely filled (5f¹⁴). The expected and observed electronic configuration of gadolinium is,₆₄Gd [Xe] 4f⁷5d¹ 6s². The expected and observed electronic configuration of lawrencium is ₁₀₃Lr [Rn] 5f¹⁴ 6d¹ 7s².

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