Structure of Atom Important Questions for NEET 2025

The atomic structure stands as a basic chemical topic which holds significant weight in the NEET 2025 Syllabus. The NEET 2025 examination usually contains questions about atomic models together with questions regarding quantum numbers electronic configuration and atomic properties.

Examining this subject enables candidates to both improve their conceptual skills and speed up problem-solving. The following article brings essential questions about atom structure that will help students succeed in their NEET 2025 exam preparation.

Understanding of Atomic Structure for NEET 2025

Chemical bonding and both periodic properties and molecular interactions depend on the base foundation of atomic structure. This topic primarily deals with:

• Atomic Models

• Quantum Mechanical Model

• Electron Configuration and Quantum Numbers

• Heisenberg's Uncertainty Principle and Albert’s Wave-Particle Duality

• Hydrogen Spectrum and Spectral Lines and more. 

Important Questions on the Structure of Atom

A set of 15 important questions are added below in multiple choice format for candidates to undertsant the types of questions asked and NEET exam pattern: 

1. Three waves will form in the third orbit of a hydrogen atom.

(A) 3 

(B) 6 

(C) 9 

(D) 12

Answer: (A) 3

2. The first orbit speed of a hydrogen atom electron is denoted by x. What will the speed of an electron be in the fourth orbit?

(A) 8x 

(B) x/4 

(C) 4x 

(D) x/8

Answer: (C) 4x 

3. If Bohr orbit radius is approx. 0.530 A° of a hydrogen atom (n = 1) , Then radius

for the first excited state (n = 2) orbit is (in A°);

(A) 0.13

(B) 1.06

(C) 4.77

(D) 2.12

Answer: (D) 2.12 

4. In Rutherford's experiment the replacement of beta (β⁻) particles with alpha (α) particles would eliminate which observation from the results?

(A) β⁻ particles scattering beyond the gold foil

(B) Majority of β⁻ particles passing through undeflected

(C) Very few β⁻ particles being absorbed

(D) Wave nature of the electron being observed

Answer: (A) β⁻ particles scattering beyond the gold foil

Also Read: How to Prepare Chemistry Section for NEET 2025? 

5. The chromium atom (atomic number 24) becomes______ when it adopts the +3 oxidation state.

(A) Diamagnetic

(B) Paramagnetic

(C) Ferromagnetic

(D) None of these

Answer: (B) Paramagnetic

6. During electron excitation in hydrogen atom to the 6th orbit, how many distinct spectral lines will be observed during its return to the ground state?

(A) 12 

(B) 15 

(C) 5 

(D) 22

Answer: (B) 15

7. The angular momentum of an electron in a hydrogen atom shows proportionality about:

(A) r²

(B) 1/r

(C) r

(D) 1/r²

Answer: (C) r

8. Statement I: The wave function of an electron depends on the spatial coordinates of the electron.

Statement II: The probability of finding an electron is directly proportional to the square of the wave function, at a given location.

Which of the following is correct?

(A) Statement I is true, but Statement II is false.

(B) Statement I is false, but Statement II is true.

(C) Both statements are true.

(D) Both statements are false.

Answer: (A) Statement I is true, but Statement II is false.

Also Read: How To Score 720 In NEET?

9. Which quantum number determines the spatial orientation of atomic orbital?

(A) Spin Quantum Number

(B) Magnetic Quantum Number

(C) Azimuthal Quantum Number

(D) Principal Quantum Number

Answer: (B) Magnetic Quantum Number

10. For the quantum numbers n = 3, l = 2, m = +2, how many orbital exists?

(A) 1

(B) 2

(C) 3

(D) 4

Answer: (A) 1 

11. An electron weighs what fraction of the mass that a hydrogen atom possesses?

(A) 1:3871

(B) 1:1296

(C) 1:1837

(D) 1:3781

Answer: (B) 1:1296

12. Based on Thomson's atomic model, how is the entire mass of an atom distributed?

(A) Uniformly across the atom

(B) Randomly distributed

(C) Partially distributed

(D) None of these

Answer: (A) Uniformly across the atom

Also Read: Best Day Wise Revision Strategy for NEET 2025
13. In Rutherford’s experiment, what fundamental atomic structure was discovered?

(A) Electrons

(B) Protons

(C) Nucleus

(D) Neutrons

Answer: (C) Nucleus

14. Statement I: All the Isobars have different number of protons.

Statement II: All the Isobars have similar chemical properties.

Which option is correct?

(A) Both statements are true.

(B) Both statements are false.

(C) Statement I is true, but Statement II is false.

(D) Statement I is false, but Statement II is true.

Answer: (C) Statement I is true, but Statement II is false.

15. Statement I: According to Bohr's atomic model, electrons move along fixed orbits but they do not lose any energy.

Statement II: An electron moving in a stationary orbit maintains equilibrium between centrifugal force and electrostatic attraction.

Which option is correct?

(A) Both statements are true.

(B) Both statements are false.

(C) Statement I is true, but Statement II is false.

(D) Statement I is false, but Statement II is true.

Answer: (A) Both statements are true.

Also Read: Must-Have Books to Score 700+ in NEET UG 2025

Conclusion

The atomic structure serves as a key subject for NEET 2025 applicants as students need to study both fundamental theoretical models and intricate quantum mechanics. Students who solve these practice questions will better understand the atomic theory and improve their test-taking skills plus answer accuracy. You will achieve good results by using a strategic plan and constant updates in your studies.