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Online Practice: Composition and size of nucleus, atomic masses, mass-energy relation, mass defect for JEE

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Sharpen your physics preparation with interactive online practice for Composition and size of nucleus, atomic masses, mass-energy relation, mass defect. Goodmarks offers 60+ JEE-style MCQs mapped to the official syllabus, each with detailed explanations so you learn from every attempt.

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Part of Atoms and Nuclei in JEE Main Physics.

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Q1PhysicsUnit 18: Atoms and Nuclei
Which of the following pairs are isotopes?
Q2PhysicsUnit 18: Atoms and Nuclei
Assertion The mass of a nucleus can be either less than or more than the sum of the masses of nucleons present in it. Reason The whole mass of the atom is concentrated in the nucleus.
Q3PhysicsUnit 18: Atoms and Nuclei
The missing particle in the reaction: 25399Es+24He→101256Md+\underset{99}{253} \boldsymbol{E} \boldsymbol{s}+_{2}^{4} \boldsymbol{H} \boldsymbol{e} \rightarrow_{101}^{256} \boldsymbol{M} \boldsymbol{d}+
Q4PhysicsUnit 18: Atoms and Nuclei
A radioactive material decays by simultaneous emission of two particles with half-lives 1620 yr and 810 yr respectively. The time in years after which one-fourth of material remains, is
Q5PhysicsUnit 18: Atoms and Nuclei
Assertion A nucleus having enrgy E1E_{1} decays by β\beta emission to daughter nucleus having energy E2E_{2} but the β\beta -rays are emitted with a continuous energy spectrum having end point energy E1−E2\boldsymbol{E}_{\mathbf{1}}-\boldsymbol{E}_{\mathbf{2}} Reason To conserve energy and moment in β\boldsymbol{\beta} decays at least three particles must take part in the transformation.
Q6PhysicsUnit 18: Atoms and Nuclei
When a radioactive nucleus emits a β\beta particular, the proton- neutron ratio
Q7PhysicsUnit 18: Atoms and Nuclei
α\alpha and β\beta - particles emitted when uranium nucleus 92U238_{92} U^{238} decay to 82Pb21482 P b^{214} are
Q8PhysicsUnit 18: Atoms and Nuclei
Beta particles are essentially:

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