Questions
11
across 8 papers
Share of subject
2.8%
of 398 Chemistry Qs
Weightage rank
#18
of 31 chapters
Difficulty
4 easy · 4 medium · 3 hard
Classification of Elements and Periodicity in Properties contributed 11 of the 398 NEET Chemistry questions between 2020 and 2026 (Re-NEET 2026 included). That is 2.8% of the subject and makes it the #18 chapter out of 31 by weightage — roughly 1.4 questions per paper, peaking at 2 in NEET 2024.
Of the 11 questions tagged for difficulty, 36% were easy, 37% medium and 27% hard — a chapter that tends to bring the tougher questions.
It has been asked more often lately: 2 questions per paper across NEET 2025, NEET 2026 and Re-NEET 2026, against 0.7 in 2020–2022.
The single most-tested topic is Nomenclature of Elements With Atomic Number > 100 — 3 questions across 3 papers.
7 topics tagged under Classification of Elements and Periodicity in Properties. Numbers show how many questions each topic had in each paper; E / M / H are the easy, medium and hard counts.
| Topic | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | Re | Total | E | M | H |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nomenclature of Elements With Atomic Number > 100 | 1 | – | 1 | – | – | – | 1 | – | 3 | 1 | – | 2 |
| Periodic Properties (Ionization Energy (Enthalpy)) | – | – | – | – | 1 | 1 | – | 1 | 3 | 1 | 1 | 1 |
| Classification of Elements as Metals, Non-Metals and Metalloids | – | – | – | – | – | – | 1 | – | 1 | 1 | – | – |
| Effective Nuclear Charge | – | – | – | 1 | – | – | – | – | 1 | 1 | – | – |
| Electronic Configuration of Elements and The Periodic Table (Groupwise Electronic Configuration) | – | – | – | – | – | 1 | – | – | 1 | – | 1 | – |
| Periodic Properties (Electron Affinity) | – | – | – | – | – | – | – | 1 | 1 | – | 1 | – |
| Periodic Properties (Electronegativity) | – | – | – | – | 1 | – | – | – | 1 | – | 1 | – |
In the NEET papers from 2020 to 2026 (including Re-NEET 2026), 11 Chemistry questions came from Classification of Elements and Periodicity in Properties — 2.8% of the subject, or about 1.4 per paper.
By past weightage it ranks #18 of 31 Chemistry chapters, so it is a lower-weightage Chemistry chapter, with 11 questions over 2020–2026.
The most-tested topics are Nomenclature of Elements With Atomic Number > 100 (3), Periodic Properties (Ionization Energy (Enthalpy)) (3) and Classification of Elements as Metals, Non-Metals and Metalloids (1). The topic table above lists every topic with its count in each paper.
Of the 11 difficulty-tagged questions, 36% were easy, 37% medium and 27% hard.
Nomenclature of Elements With Atomic Number > 100, Periodic Properties (Ionization Energy (Enthalpy)), Classification of Elements as Metals, Non-Metals and Metalloids and Periodic Properties (Electron Affinity) were asked in the 2026 papers.
Edurack has chapter-wise NEET previous-year questions for Classification of Elements and Periodicity in Properties. Use the practice button on this page to open the set, attempt questions and check your answers.
Counts come from Edurack's tagged set of NEET papers 2020–2026 (including Re-NEET 2026), mapped to NCERT chapters and topics. Use them as a trend guide — past frequency doesn't guarantee what a future paper will ask.