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Answer 1

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Sub atomic particles are the particles which are smaller than the atom and comprise the atom.It is the most smallest particles of elements found in nature.

The three subatomic particles present in an atom are

Protons

Nuetrons

Electrons

CHARGE

The Protons are positively charged.

The Electrons are negatively charged.

The nuetrons have no charge.

MASS

The mass of an electron is about 1/1200 times the mass of protons and nuetrons.

The mass of a protons is 1 atomic unit(amu).(Sometimes depend on the type of element).

The mass of a nuetron is somewhat greater than the proton (1 atomic unit).).(Sometimes depend on the type of element).

LOCATION

Protons are present in the nucleus of an atom and contribute to the mass of an atom.

Nuetrons are present in the nucleus(except hydrogen) of an atom and contribute to the mass of an atom.

Electrons are mainly found outside the nucleus of an atom and do not contribute to the mass of an atom.

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Answer 2

Subatomic particles are particles that are smaller than an atom. 

The number of subatomic particles known to science could be counted on the fingers of one hand: protons, neutrons, electrons, neutrinos, and positrons.

The first three particles were known to be the building blocks from which atoms are made: protons and neutrons in atomic nuclei and electrons in orbit around those nuclei. Neutrinos and positrons were somewhat peculiar particles discovered outside Earth's atmosphere and of uncertain origin or significance.

Note:
That view of matter changed dramatically over the next two decades. With the invention of particle accelerators (atom-smashers) and the discovery of nuclear fission and fusion, the number of known subatomic particles increased. Scientists discovered a number of particles that exist at energies higher than those normally observed in our everyday lives: sigma particles, lambda particles, delta particles, epsilon particles, and other particles in positive, negative, and neutral forms. By the end of the 1950s, so many subatomic particles had been discovered that some physicists referred to their list as a "particle zoo."

Intelligent answer:
The quick answer is ‘nothing’. All so-called ‘particles’ of Quantum are deemed to be zero-dimensional. They have no body or structure or radius or size. That’s one reason you will never see a picture of a ‘particle’ in the Standard Model