HomeTestsSearchRankProfile

Atoms Questions

Practice 20 Atoms questions with detailed answers and explanations. Free MCQs, PYQs, and mock test questions for NEET, JEE, GATE, SSC and more.

๐Ÿ“š
20
Total Questions
๐ŸŸข
8
Easy
๐ŸŸก
10
Medium
๐Ÿ”ด
2
Hard
Practice by Exam:Physics(19)PHYSICS(1)

About atoms โ€” practice questions, PYQs & concepts

atoms is a frequently-tested topic on Physics, PHYSICS. ExamTest.live currently lists 20 atoms questions spanning previous-year papers from 2026 to 2026, each with worked solutions and a step-by-step explanation. Use the filters on this page to focus on a specific exam, difficulty level or year โ€” every answer key is free, no sign-up required.

atoms weight in competitive exams

Across our atoms question bank, the largest sources are Physics (19) and PHYSICS (1). Click any exam chip above to drill down to that exam-specific question set.

How to use this page

  • Start easy: 8 easy atoms questions are available โ€” build fluency before moving up.
  • Target weak years: Use the year filter to focus on the most recent 2026 paper or older PYQs you have not attempted.
  • Time yourself: Every question shows the average solve time so you can benchmark your speed against other students.
  • Read every explanation: Even on questions you got right โ€” the explanation often surfaces a faster approach you can reuse.

All Atoms Questions(1โ€“20 of 20)

Filter:
Q1mediummcqPhysicsNEET (UG) 20172026
0% accuracy
The ratio of wavelengths of the last line of Balmer series and the last line of Lyman series is:
Q2mediummcqPhysicsJEE Main2026
In a hydrogen like atom electron makes transition from an energy level with quantum number to another with quantum number . If , the frequency of radiation emitted is proportional to:
Q3easymcqPhysicsAIEEE 20122026
Hydrogen atom is excited from ground state to another state with principal quantum number equal to 4. Then the number of spectral lines in the emission spectra will be:
Q4easymcqPhysicsAIEEE 20032026
The wavelengths involved in the spectrum of deuterium () are slightly different from that of hydrogen spectrum, because:
Q5mediummcqPhysicsAIEEE 20032026
Which of the following atoms has the lowest ionization potential?
Q6mediumassertion/reasoningPhysicsNEET (UG) 20242026
Given
Q7easymcqPhysicsNEET 2020 E12026
For which one of the following, Bohr model is not valid?
Q8mediummcqPHYSICSNEET 20192026
The radius of the first permitted Bohr orbit for the electron in a hydrogen atom equals and its ground state energy equals . If the electron in the hydrogen atom is replaced by a muon () [charge same as electron and mass ], the first Bohr radius and ground state energy will be ( represents the mass of an electron):
Q9easymcqPhysicsNEET (UG) 20182026
The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom, is:
Q10mediummcqPhysicsPhysics
If an electron in a hydrogen atom jumps from the 3rd orbit to the 2nd orbit, it emits a photon of wavelength . When it jumps from the 4th orbit to the 3rd orbit, the corresponding wavelength of the photon will be:
Q11easymcqPhysicsPhysics
The ground state energy of hydrogen atom is . What is the potential energy of the electron in this state?
Q12easymcqPhysicsPhysics
When an -particle of mass moving with velocity bombards on a heavy nucleus of charge , its distance of closest approach from the nucleus depends on as:
Q13mediummcqPhysicsPhysics
Given the value of Rydberg constant is , the wave number of the last line of the Balmer series in hydrogen spectrum will be:
Q14hardmcqPhysicsPhysics
Electron in hydrogen atom first jumps from third excited state to second excited state and then from second excited to the first excited state. The ratio of the wavelengths emitted in the two cases is:
Q15hardmcqPhysicsPhysics
An electron of a stationary hydrogen atom passes from the fifth energy level to the ground level. The velocity that the atom acquired as a result of photon emission will be:
Q16easymcqPhysicsPhysics
Transition to results in ultraviolet radiation. Infrared radiation will be obtained in:
Q17mediummcqPhysicsPhysics
The ionization energy of the electron in the hydrogen atom in its ground state is . The atoms are excited to higher energy levels to emit radiations of wavelengths. Maximum wavelength of emitted radiation corresponds to the transition between:
Q18easymcqPhysicsPhysics
In a Rutherford scattering experiment when a projectile of charge and mass approaches a target nucleus of charge and mass , the distance of closest approach is . The energy of the projectile is:
Q19mediummcqPhysicsPhysics
In a discharge tube ionization of enclosed gas is produced due to collisions between:
Q20mediummcqPhysicsPhysics
The ionization potential of the hydrogen atom is . Hydrogen atoms in the ground state are excited by monochromatic radiation of photon energy . According to Bohrโ€™s theory, the spectral lines emitted by hydrogen will be:

Frequently Asked Questions

How many Atoms questions are on ExamTest.live?โ–ผ
We have 20 Atoms questions spread across 1 pages, covering easy, medium, and hard difficulty levels with detailed explanations.
Are Atoms MCQs free?โ–ผ
Yes. All Atoms questions, answers, and explanations on ExamTest.live are completely free. No account or subscription required.
Which exams include Atoms questions?โ–ผ
Atoms questions are commonly asked in Physics, PHYSICS. You can filter by exam using the links above.
How do I practice Atoms questions effectively?โ–ผ
Start with easy questions to build confidence, then tackle medium and hard ones. Use the filter buttons to sort by difficulty. Reveal the answer only after attempting each question, and read the explanation thoroughly.