MCQ
Which of the following subatomic particle is lightest?
- ANeutron
- BAlpha particle
- ✓Electron
- DDeuterium
✓
Answer
Correct option: C.
Electron
Alpha particle has highest mass of the given option which is he rest mass of the alpha particle amounts to $6.64424 \times 10^{-27} \mathrm{~kg}$. Mass of neutron is $1.0086654 a.m.u.$
Mass of electrons $=9.10938291 \times 10^{-31}$ kilograms.
Hence mass of alpha particle is greatest.
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