is a subatomic particle with positive elementary electric charge (+) which is part of the nucleus of the atom.
The proton has a positive charge and a mass 1,840 times that of the electron (which, by convention, is equal to 1). In a stable atom, the number of protons in the nucleus is equal to that of electrons. The proton and the neutron are also called nucleones.El hydrogen atom's nucleus is composed of a single proton. The mass of a proton is 1.6726 × 10-27 kg, approximately 1,836 times that of the electron. Therefore, the mass of an atom is concentrated almost exclusively on his núcleo.El proton has an intrinsic angular momentum or spin, and therefore a magnetic moment.
Moreover, the proton satisfies the exclusion principle. The atomic number of an item indicates the number of protons in its nucleus, and determines what element it is.
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