JEE Main 2021 — D And F Block Elements Question with Solution
From: JEE Main 2021 (Online) 27th August Morning Shift
Question
The number of f electrons in the ground state electronic configuration of Np (Z = 93) is ___________. (Nearest integer)
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Show full solutionCorrect answer: 18
Correct answer
18
Step-by-step explanation
Np = 1s2 22 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2
4f14 5d10 6p6 7s2 5f4 6d1
Total No. of 'f' electron = 14e + 4e = 18
4f14 5d10 6p6 7s2 5f4 6d1
Total No. of 'f' electron = 14e + 4e = 18
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This is a previous-year question from JEE Main 2021, covering the D And F Block Elements chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.