The 'rest mass' of the photon is zero ... but the photon is never at rest, and it
has plenty of mass at the speed of light, at which it is always traveling. so that
let's the photon out.
Amongst particles that actually have rest mass, but not much of it, the neutrino
probably has the least.
among these Electron has the least mass....
The least massive principle atomic particle is the electron. Neutrons and protons are much more massive and are about equal in mass. Of course, there are even smaller particles such as quarks which are less massive than even electrons.
The correct order is c) Alpha particle, beta particle, gamma ray. Alpha particles have the greatest mass, followed by beta particles, and then gamma rays which have no mass.
The mass and size of an alpha particle compare with the masa and size of beta particle in the sense that the alpha particle is significantly larger in both size and mass that the beta and gamma particles. This is why it is called the alpha particle.
least - electron most - the top quark
the electron
Which particle? The electron.
The three main subatomic particles are the proton, neutron, and electron. Of these three, the electron has the least amount of mass at about 0.0005 amu or atomic mass units.
In the atom this particle is the electron. Generally in the particle physics: photons, gluons, neutrinos.
The electron is the subatomic particle with the least mass. It has a mass of about 1/1836 of a proton or neutron.
among these Electron has the least mass....
the electron
This particle is the neutron.
Well, that's kinda a trick question because an electron is pure energy. An electron particle is also the smallest of the 4, so its the electron (eventhough an electron is a weichtless particle such as a graviton or magneton! Hope I helped!!
An electron has the least mass among the three fundamental particles of an atom, which includes protons and neutrons.
rest energy
The least massive principle atomic particle is the electron. Neutrons and protons are much more massive and are about equal in mass. Of course, there are even smaller particles such as quarks which are less massive than even electrons.