Question

which subatomic particle has the least mass?

Answer 1

hey mate!

here is ur ans....

>>electron<<

The fundamental particle that has least mass is electron.

hope it helps...☺❤

Answer 2

Answer:

Among all the subatomic particle, Electron has the least mass.

Explanation:

There are three main subatomic particles:

• Proton- Positively charged particles residing in the nucleus of an atom. It contributes to mass of the atom.

• Neutron- These are neutral particles with no charge residing in the nucleus of an atom. Along with proton, neutron also contributes to mass of an atom.

• Electron- These are negatively charged particles that orbit around the nucleus. It has no contribution in the mass of any atom.

• Mass of a proton = $1.672$×$10^{-27}$ kg

• Mass of an electron = $9.1$×$10^{-31}$ kg

• Mass of a neutron = $1.674$ ×$10^{-27}$ kg

So, the least mass is that of an electron.

• Atomic mass of an atom = number of protons + number of neutrons

• Atomic number of an atom = number of protons = number of electrons