Incorrect set of quantum numbers from the following is :

$$\mathrm{n}=5,1=2, \mathrm{~m}_1=-2,-1,+1,+2, \mathrm{~m}_{\mathrm{s}}=+\frac{1}{2}$$

$$\mathrm{n}=4,1=3, \mathrm{~m}_1=-3,-2,-1,0,+1,+2,+3, \mathrm{~m}_{\mathrm{s}}=-\frac{1}{2}$$

$$\mathrm{n}=4,1=2, \mathrm{~m}_1=-2,-1,0,+1,+2, \mathrm{m}_{\mathrm{s}}=-\frac{1}{2}$$

$$\mathrm{n}=5,1=3, \mathrm{~m}_1=-3,-2,-1,0,+1,+2,+3, \mathrm{m}_{\mathrm{s}}=+\frac{1}{2}$$

If radius of second Bohr orbit of the He+ ion is 105.8 pm, what is the radius of third Bohr orbit of Li2+ ion?

158.7 $\mathop{\text{Å}}\limits^o$

Structure Of Atom — NEET Previous Year Questions

25 solved PYQs · 2016–2026 · Chemistry

Solved PYQs: 25
Years covered: 2016–2026
Avg / year: ~3
Subject: Chemistry

How many NEET questions come from Structure Of Atom?

Structure Of Atom has contributed 25 questions to National Eligibility cum Entrance Test (UG) papers between 2016 and 2026 — an average of about 3 questions a year. That count is measured from EByAi’s bank of 46,150 NEET questions, not estimated from a syllabus. Every one of the 25 questions carries a written, step-by-step solution, and each is tagged to Structure Of Atom within Chemistry, so you can drill this chapter across every year at once instead of hunting through paper PDFs. Practising a chapter’s full PYQ history is the fastest way to learn the patterns examiners reuse.

Sample Structure Of Atom questions from real NEET papers

These are 5 real questions from the bank — exactly as asked, with the answer one tap away. All 25 Structure Of Atom questions (with full written solutions) are available in practice.

Question 1 · NEET 2023
Incorrect set of quantum numbers from the following is :
1. (A) $n = 4, 1 = 3, m_{1} = - 3, - 2, - 1, 0, + 1, + 2, + 3, m_{s} = - \frac{1}{2}$
2. (B) $n = 5, 1 = 2, m_{1} = - 2, - 1, + 1, + 2, m_{s} = + \frac{1}{2}$
3. (C) $n = 4, 1 = 2, m_{1} = - 2, - 1, 0, + 1, + 2, m_{s} = - \frac{1}{2}$
4. (D) $n = 5, 1 = 3, m_{1} = - 3, - 2, - 1, 0, + 1, + 2, + 3, m_{s} = + \frac{1}{2}$
Show answerAnswer
$Answer: (B) n = 5, 1 = 2, m_{1} = - 2, - 1, + 1, + 2, m_{s} = + \frac{1}{2}$
Question 2 · NEET 2022
If radius of second Bohr orbit of the He+ ion is 105.8 pm, what is the radius of third Bohr orbit of Li2+ ion?
1. (A) $158.7 pm$
2. (B) $15.87 pm$
3. (C) $1.587 pm$
4. (D) $158.7 \overset{˚}{A} o$
Show answerAnswer
$Answer: (A) 158.7 pm$
Question 3 · NEET 2019
4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is :
1. (A) $6p > 5f > 4d > 5p$
2. (B) $5f > 6p > 4d > 5p$
3. (C) $5f > 6p > 5p > 4d$
4. (D) $6p > 5f > 5p > 4d$
Show answerAnswer
$Answer: (C) 5f > 6p > 5p > 4d$
Question 4 · NEET 2019
Which of the following series of transitions in the spectrum of hydrogen atom falls in visible region?
1. (A) $Paschen series$
2. (B) $Brackett series$
3. (C) $Lyman series$
4. (D) $Balmer series$
Show answerAnswer
$Answer: (D) Balmer series$
Question 5 · NEET 2016
Two electrons occupying the same orbital are distinguished by
1. (A) $azimuthal quantum number$
2. (B) $spin quantum number$
3. (C) $principal quantum number$
4. (D) $magnetic quantum number$
Show answerAnswer
$Answer: (B) spin quantum number$

Structure Of Atom questions by year

Year	Questions	Share of chapter questions
2026	2
2025	2
2024	4
2023	4
2022	4
2021	2
2019	2
2018	1
2017	1
2016	3

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FAQs

How many NEET questions have been asked from Structure Of Atom?

EByAi's bank holds 25 real NEET questions from Structure Of Atom, asked between 2016 and 2026 — about 3 per year on average. Every count is measured from actual papers, not estimated.

Is Structure Of Atom important for NEET?

25 questions over 10 papers make Structure Of Atom a steady-weightage chapter in NEET Chemistry. The year-wise table above shows exactly how often it appears.

Can I solve Structure Of Atom PYQs online for free?

Yes. EByAi lets you solve NEET past-year questions in the browser with written solutions — free daily practice, no card needed.

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