NEET UG · Chemistry · Structure of Atom
Single-Electron Species Energy Exception
NEET asked Single-Electron Species Energy Exception 3 times, in 2024 and 2025: 3 of the 1,875 questions in the 10 papers from 2017–2026. It belongs to Quantum Numbers, in Structure of Atom (Chemistry). The longest wait between two papers asking it was 1 year.
Updated 2026-10-08
- Times asked
- 3
- in 2017–2026
- Papers
- 2
- of 10
- First asked
- 2024
- last in 2025
- Chance next paper
- 11%
- calibrated historical rate
Questions on this idea, by paper
2017–2026. 2024 and 2025.
How NEET framed it
Numerical is the usual form. Skill tested: calculation.
- Numerical
Chance asked next paper 11%
Every question
All 3 questions
From the official NEET UG papers, newest first. Open one for the full question, the options and the official answer.
- 2025 Q46The ratio of the wavelengths of the light absorbed by a Hydrogen atom when it undergoes and …Numerical · Medium
- 2025 Q50Energy and radius of first Bohr orbit of and are [Given J, = 52.9 pm]Numerical · Medium
- 2024 Q57The energy of an electron in the ground state (n = 1) for He ion is J, then that for an electron in n = 2 state for Be ion…Numerical · Medium
Same topic
Other ideas in Quantum Numbers
Quantum Numbers has 13 ideas NEET has asked; 2 of them came up in more than one question.
- Orbital Degeneracy2× · 2022
- Graphical Identification of Radial Nodesonce · 2026
- Azimuthal Quantum Number (l)once · 2024
- Fundamental Particles and Early Atomic Modelsonce · 2023
- Magnetic Quantum Number (ml)once · 2023
- Bohr Orbit Radiusonce · 2022
- Isoelectronic Species Configurationsonce · 2021
- Wave Nature of Electromagnetic Radiationonce · 2021
- Atomic Number, Mass Number and Particle Countsonce · 2020
- Hydrogen Spectral Seriesonce · 2019
- The (n+l) Ruleonce · 2019
- Electronic Filling Rulesonce · 2018