Home Physics Atomic and Nuclear Physics Nucleus, Nuclear Reaction The mass of a neutron is the same as that of
Physics Atomic and Nuclear Physics Nucleus, Nuclear Reaction Single Correct MCQ
Published on: September 12, 2026

The mass of a neutron is the same as that of

A
A proton
B
A meson
C
An epsilon
D
An electron

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Text Solution

Verified by Experts
The correct answer is:
A
Step 1: Understand the mass equivalences of subatomic particles. The mass of a neutron is approximately 1.675 x 10-27 kg.
Step 2: Compare the mass of a neutron with other options:
  • Proton: The mass of a proton is approximately 1.673 x 10-27 kg, which is very close to that of a neutron.
  • Meson: Mesons have varying masses, generally around 1.0 x 10-27 kg to several times larger than a neutron, depending on the type.
  • Epsilon: This is not a standard term used in particle physics for mass comparisons.
  • Electron: The mass of an electron is approximately 9.11 x 10-31 kg, which is much smaller than that of a neutron.
Conclusion: The mass of a neutron is essentially similar to that of a proton. Therefore, the correct answer is Option A: A proton.

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