A proton is a subatomic particle with a positive charge. It resides in the atomic nucleus. Atoms consist of smaller particles called protons, neutrons, and electrons. Here is the definition of a proton, its electric charge, where it's found in the atom, and a collection of proton facts. What are Protons? Protons are the positively charged particles which are present in the nucleus of an atom. An atom is composed of protons, electrons, and neutrons. The entire mass of an atom is concentrated in the nucleus which is at the centre. The nucleus contains protons and neutrons which are collectively called nucleons. Electrons revolve The proton is, in effect, the index particle of any atom. It is the number of protons in an atom that determines the identity of the element an atom belongs to; in other words, if two atoms have a different number of protons, they are not the same element. Number of Protons = Atomic Number of the Element. Number of Electrons = Number of Protons. Number of Neutrons = Mass Number - Atomic Number. Find the Number of Protons. Each element is defined by the number of protons found in each of its atoms. No matter how many electrons or neutrons an atom has, the element is defined by its number of protons. The proton is a subatomic particle with a positive electrical charge. They are found in every atomic nucleus of every element. In almost every element, protons are accompanied by neutrons. The only exception is the nucleus of the simplest element, hydrogen. Hydrogen contains only a single proton and no neutrons. P5lTX1.

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