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Saturday, 31 October

JEE Main · Chemistry · Structure of Atom

Quantum Numbers of the Differentiating Electron

JEE Main asked Quantum Numbers of the Differentiating Electron 2 times in 2 of the 108 shifts Lumi analysed, all in 2024. It belongs to Quantum Numbers, in Structure of Atom (Chemistry). In 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
2
in 2 shifts
Years
1 of 8
First asked
2024
the only year
Pattern
New since 2024
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2024. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.050.10’170’200’210’220’230.09’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 2 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20260 of 9
  • 20250 of 8
  • 20242 of 18
  • 20230 of 12
  • 20220 of 24
  • 20210 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Single correct is the usual form. Skill tested: application.

  • Quantum numbers of valence electron
  • Quantum numbers of outermost electron

Difficulty

Easy 2Medium 0Hard 0

Every question was multiple choice.

Every question

All 2 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 31 Jan 2024, Shift 2 · Q62The four quantum numbers for the electron in the outer most orbital of potassium (atomic no. 19) areEasySingle correct
  2. 29 Jan 2024, Shift 1 · Q61The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is :EasySingle correct

Shifts: 29 Jan 2024, Shift 1, 31 Jan 2024, Shift 2.

Same topic

Other ideas in Quantum Numbers

Quantum Numbers has 23 ideas JEE Main has asked; 9 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas