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Saturday, 31 October

JEE Main · Chemistry · Classification of Elements and Periodicity in Properties

Atomic and Ionic Radii Trends

JEE Main asked Atomic and Ionic Radii Trends 6 times in 6 of the 108 shifts Lumi analysed, in 2020, 2024 and 2025. It belongs to Periodic Trends, in Classification of Elements and Periodicity in Properties (Chemistry). The longest wait between two years asking it was 4 years. In 2020 and 2024 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
6
in 6 shifts
Years
3 of 8
First asked
2020
last in 2025
Pattern
Frequent
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2020, 2024 and 2025. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Chemistry questions.

00.10.20’170.17’200’210’220’230.14’240.13’250’26

Raw count: 2017: 0 in 1 shift · 2020: 2 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 3 in 18 shifts · 2025: 1 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
  • 20251 of 8
  • 20243 of 18
  • 20230 of 12
  • 20220 of 24
  • 20210 of 24
  • 20202 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: conceptual.

  • Identify incorrect trend in atomic radii
  • Count correct statements on periodic trends

Difficulty

Easy 4Medium 2Hard 0

Every question was multiple choice.

Every question

All 6 questions

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

  1. 7 Apr 2025, Shift 2 · Q59Choose the incorrect trend in the atomic radii (r) of the elements.EasySingle correct
  2. 31 Jan 2024, Shift 2 · Q66Consider the following elements. Group ↓\downarrow A' B' →\rightarrow Period C' D' Which of the following is/are true about A', B', C'…MediumOtherHas a figure
  3. 30 Jan 2024, Shift 1 · Q65Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : There is a…MediumAssertion–reason
  4. 5 Apr 2024, Shift 2 · Q66Given below are two statements : Statement I : The metallic radius of Na is 1.86 A∘1.86\ \mathrm{A^\circ} and the ionic radius of…EasyTwo statements
  5. 2 Sep 2020, Shift 1 · Q32In general, the property (magnitudes only) that shows an opposite trend in comparison to other properties across a period is :EasySingle correct
  6. 8 Jan 2020, Shift 2 · Q32The increasing order of the atomic radii of the following elements is : (a) C (b) O (c) F (d) Cl (e) BrEasySingle correct

Shifts: 8 Jan 2020, Shift 2, 2 Sep 2020, Shift 1, 30 Jan 2024, Shift 1, 31 Jan 2024, Shift 2, 5 Apr 2024, Shift 2, 7 Apr 2025, Shift 2.

Same topic

Other ideas in Periodic Trends

Periodic Trends has 25 ideas JEE Main has asked; 17 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas