All matter is composed of tiny indivisible and individual particles called atoms. The atom is the building block of chemistry. It is the smallest unit into which matter can be partitioned. Atoms can neither be created nor destroyed. Atoms of one element are different from the atoms of another. All the atoms of the given element are identical in size, mass and characteristics.

The atom nucleus comprises three parts: electron, proton, neutron. Protons are positively charged in nature. Except for electrons, all the subatomic particles have the same mass. All the atoms except hydrogen are composed of three basic subatomic particles. These three are regarded as fundamental particles because they are the main constituents of all atoms.

Discovery of protons

• Discovery of protons dates to the earliest investigations of atomic structure.
• Protons are positively charged particles that are inside the nucleus of an atom, symbolically represented as P.
• While reading about streams of ionised gaseous atoms and molecules from which electrons were stripped, Wilhelm Wien (1898) and J.J. Thomson (1910) knew a positive particle equal in mass to the hydrogen atom.
•  Ernest Rutherford showed (1919) that when alpha particles bombard nitrogen, it ejects what seem to be element nuclei. By 1920, he had accepted the hydrogen nucleus as a particle, naming it protium.
• Protons are pushed apart by the electromagnetic force but pulled together by the strong force, stronger over short distances ( 10-15 metres).

Properties of Protons

• It is a fundamental particle that carries a positive unit charge in the atom.
• It is the lightest and strongest baryon and is as important as an electron.
• Nucleon includes a mass of 1.673 × 10-27 kilogram
• The name  is derived from Protium. 
• It belongs to the hadron family.
• Protons stabilise the negative charge of electrons.
• They can flow through anode particles.
• They do not decay spontaneously.
• The mass is 1836 instances of mass of electrons in the atom. 
• Nucleon incorporates a  spin of ½ and parity of +1.
• It has a charge radius of 0.8414(19) femtometers.
• It is electrically and magnetically polarisable.

What is a proton?

• These are fundamental elemental particles called quarks and gluons.
• It contains three quarks. Two of the quarks are called up quarks (u), and the third quark is named a down quark (d)
• The gluons carry the robust nuclear force between the quarks, binding them.
• This is one in every three primary particles that frame the atom. It is found within the nucleus. It has an electrical charge of +1 and a mass of 1 atomic mass unit (AMU)
• Nucleons together with electrically neutral particles called neutrons constitute all atomic nuclei aside from the hydrogen nucleus (which consists of one nucleon)
• Isotopes are unit members of a family of parts that each one has a similar range of nucleons but different numbers of neutrons.
• When the variety of this subatomic particle in a nucleus is equal because of the type of electrons rounding the nucleus, the atom is electrically impartial.
• These are heavier than electrons and occupy the nucleus at the centre of the atom. 
• These are known to alter into neutrons through the process  called  electron capture.
• Neutrons will turn back to protons through radioactive decay.
• Protons carry a positive charge, and electrons have a negative charge. The positive and negative charges attract each other.
• The amount of subatomic particles in a nucleus is called the atomic number, which determines the chemical element the atom belongs to. It is frequently denoted by Z. As an example, a neutral chlorine atom has 17 protons and 17 electrons, whereas a Cl− anion has 17 nucleons and 18 electrons for a complete charge of −1.

Overview of protons

• The overview of the prototype of the atom proposed by Rutherford is so far referred to as the standard model and was mainly acknowledged around then. It was later found that there had been certain aspects that this prototype did not answer.
• Maxwell stated that electrons should emit electromagnetic radiation as many accelerated charged particles tend to emit electromagnetic radiation. Rutherford expressed that the electrons do revolve around the nucleus in their orbits.
• Due to the kinetic motion of electrons, the radiation causes shrinking of electrons but less than 10 seconds as the atom will keep on losing energy. As a result, the Rutherford model did not support Maxwell’s theory and couldn’t explain why atoms were stable.
• Overview of proton in Rutherford atomic model failed to explain the arrangement of electrons in an atom.

Conclusion

Proton is a charged subatomic particle that is a part of all atomic nuclei. It is the lightest and strongest baryon possessing a charge identical to that of an electron. The overview of Rutherford’s nuclear version failed to give an explanation for approximately the association of electrons in an atom and the stability of an atom. Except electrons, all the subatomic particles have the same mass.