JEE Main 2019ChemistryStructure of AtomMediumMCQ

JEE Main 2019Structure of Atom Question with Solution

JEE Main 2019 (10 Jan Shift 2)

Question

The 71st electron of an element X with an atomic number of 71 enters the orbital:

Choose an option

Show full solutionCorrect option: A
Correct answer
A5d

Step-by-step explanation

 71Lu :Xe 4f146s25d1 (The last electron enters 5d orbital)

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About this question

This is a previous-year question from JEE Main 2019, covering the Structure of Atom 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.