Consider the following four particles : 1. Alpha particle 2. Proton 3. Electorn 4. Neutron Which of the following is the correct sequence in which their rest-masses increase?

The rest-masses of the particles follow a specific hierarchy based on their subatomic properties. The electron is the lightest, with a mass of approximately 0.0005486 u or 9.1094 × 10⁻³¹ kg. Protons and neutrons are significantly heavier; a proton has a rest-mass of about 1.007276 u. The neutron is slightly more massive than the proton, with a rest-mass of approximately 1.008665 u. Finally, the alpha particle, which is a helium nucleus consisting of two protons and two neutrons, is the heaviest of the four, with a mass of approximately 4.0015 u to 4.0030 u. Therefore, the correct sequence of increasing rest-masses is Electron (3), Proton (2), Neutron (4), and Alpha particle (1), which corresponds to the sequence 3-2-4-1.

Sources

1. [1] https://www.sciencedirect.com/topics/mathematics/atomic-mass