Questions
13
across 8 papers
Share of subject
3.3%
of 398 Chemistry Qs
Weightage rank
#15
of 31 chapters
Difficulty
4 easy · 6 medium · 3 hard
Structure of Atom contributed 13 of the 398 NEET Chemistry questions between 2020 and 2026 (Re-NEET 2026 included). That is 3.3% of the subject and makes it the #15 chapter out of 31 by weightage — roughly 1.6 questions per paper, peaking at 2 in NEET 2021.
Of the 13 questions tagged for difficulty, 31% were easy, 46% medium and 23% hard — a fairly balanced mix of easy and moderate questions.
Its weight has stayed fairly steady: 1.7 questions per paper across NEET 2025, NEET 2026 and Re-NEET 2026, against 1.7 in 2020–2022.
The single most-tested topic is Bohr's Model for Hydrogen Atom (Energy of Electron) — 2 questions across 2 papers.
10 topics tagged under Structure of Atom. 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bohr's Model for Hydrogen Atom (Energy of Electron) | – | 1 | – | – | 1 | – | – | – | 2 | – | 1 | 1 |
| Bohr's Model for Hydrogen Atom (Radius of Shell) | – | – | 1 | – | – | 1 | – | – | 2 | – | 2 | – |
| Quantum Mechanical Model of the Atom (Concept of Orbitals) | – | – | 1 | 1 | – | – | – | – | 2 | – | – | 2 |
| Bohr's Model for Hydrogen Atom (Explanation of Line Spectrum of Hydrogen) | – | – | – | – | – | 1 | – | – | 1 | – | 1 | – |
| Bohr's Model for Hydrogen Atom (Limitations of Bohr's Model) | 1 | – | – | – | – | – | – | – | 1 | 1 | – | – |
| Isoelectronic Species | – | 1 | – | – | – | – | – | – | 1 | 1 | – | – |
| Particle Nature of Electromagnetic Radiation: Planck’s Quantum (Planck’s Quantum Theory) | – | – | – | – | – | – | 1 | – | 1 | 1 | – | – |
| Quantum Mechanical Model of the Atom (Quantum Number) | – | – | – | – | 1 | – | – | – | 1 | – | 1 | – |
| Quantum Mechanical Model of the Atom (Radial and Angular Nodes) | – | – | – | – | – | – | – | 1 | 1 | – | 1 | – |
| Quantum Number (Principal Quantum Number) | – | – | – | – | – | – | 1 | – | 1 | 1 | – | – |
No topic has appeared in three or more different papers.
In the NEET papers from 2020 to 2026 (including Re-NEET 2026), 13 Chemistry questions came from Structure of Atom — 3.3% of the subject, or about 1.6 per paper.
By past weightage it ranks #15 of 31 Chemistry chapters, so it is an above-average-weightage Chemistry chapter, with 13 questions over 2020–2026.
The most-tested topics are Bohr's Model for Hydrogen Atom (Energy of Electron) (2), Bohr's Model for Hydrogen Atom (Radius of Shell) (2) and Quantum Mechanical Model of the Atom (Concept of Orbitals) (2). The topic table above lists every topic with its count in each paper.
Of the 13 difficulty-tagged questions, 31% were easy, 46% medium and 23% hard.
Particle Nature of Electromagnetic Radiation: Planck’s Quantum (Planck’s…, Quantum Mechanical Model of the Atom (Radial and Angular Nodes) and Quantum Number (Principal Quantum Number) were asked in the 2026 papers.
Edurack has chapter-wise NEET previous-year questions for Structure of Atom. 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.