JEE Main Classification of Elements and Periodicity: Weightage, Key Concepts and Study Plan
Classification of Elements and Periodicity in JEE Main: 82 questions across 2022–2026, rank #16 of 20 in Chemistry, gaining momentum. Year-wise data, key concepts and a study plan.
Edurack
October 21, 2026
Classification of Elements and Periodicity is a lighter JEE Main Chemistry chapter, but it is trending up, from 2.3% of the subject in 2022–23 to 3.8% in 2024–26. Here is what five years of JEE Main questions say about it, and how to prepare.
At a glance
- 82 questions across 2022–2026, all shifts
- 2.8% of Chemistry over five years and 3.8% in 2024–2026
- Rank #16 of 20 Chemistry chapters by recent weight
- Momentum: Gaining
- Asked in 5 of 5 years; busiest year 2025 with 22 questions
- 19 questions in the 2026 papers
Year-wise questions
| Year | 2022 | 2023 | 2024 | 2025 | 2026 | Total |
|---|---|---|---|---|---|---|
| Questions | 13 | 12 | 16 | 22 | 19 | 82 |
How Classification of Elements and Periodicity compares inside Chemistry
| Rank | Chapter | Total Qs | 2024–26 share | Momentum |
|---|---|---|---|---|
| 14 | Chemical Kinetics | 112 | 4.3% | Stable |
| 15 | Organic Compounds Containing Nitrogen | 126 | 4.2% | Stable |
| 16 | Classification of Elements and Periodicity | 82 | 3.8% | Gaining |
| 17 | Biomolecules | 108 | 3.7% | Stable |
| 18 | Purification and Characterisation of Organic Compounds | 94 | 3.6% | Stable |
Concepts that repeat
These specific ideas came back most often inside Classification of Elements and Periodicity.
| Concept | 2022 | 2023 | 2024 | 2025 | 2026 | Total |
|---|---|---|---|---|---|---|
| Ionisation Enthalpy | 5 | 3 | 3 | 0 | 6 | 17 |
Start your practice with these. Each one has appeared in several different years, so it is worth knowing the question styles.
What the syllabus covers
Modern periodic law, s-, p-, d- and f-block elements, periodic trends in radii, ionisation enthalpy, electron gain enthalpy, valence and oxidation states.
A checklist to tick off:
- Modern periodic law
- S-
- P-
- D- and f-block elements
- Periodic trends in radii
- Ionisation enthalpy
- Electron gain enthalpy
- Valence and oxidation states
What to focus on
Trends in radii, ionisation enthalpy, electron gain enthalpy and electronegativity, with their exceptions.
A study plan for this chapter
Because it is gaining weight, move it up your list and give it extra practice. If you divide your Chemistry time in proportion to recent weightage, this chapter earns about 4% of it.
- Day 1–2: a fast pass over theory and the standard results.
- Day 3: chapter-wise PYQs, then log the mistakes.
- Ongoing: a quick look before each mock test.
Keep reading
- The full ranking: JEE Main Chemistry chapter-wise weightage
- Next chapter by weight: Biomolecules
- A heavier neighbour: Organic Compounds Containing Nitrogen
See Classification of Elements and Periodicity on the weightage page →
Frequently Asked Questions
How many questions has Classification of Elements and Periodicity had in JEE Main?
82 questions across 2022–2026, counting every shift: 2022: 13, 2023: 12, 2024: 16, 2025: 22, 2026: 19.
Is Classification of Elements and Periodicity important for JEE Main Chemistry?
It ranks #16 of 20 Chemistry chapters by recent weight, which puts it in tier 3 of 3 for preparation. Its momentum is labelled Gaining.
How should I start Classification of Elements and Periodicity?
Trends in radii, ionisation enthalpy, electron gain enthalpy and electronegativity, with their exceptions. Then solve chapter-wise previous-year questions.