A proton, symbol p or p +, is one of the subatomic particles that make up matter. In the universe, protons are abundant, making up about half of all visible matter. An atom can be classified as a particular element based solely on its atomic number. For example, any atom with an atomic number of 8 (its nucleus contains 8 protons) is an oxygen atom, and any atom with a different number of protons would be a different element. A proton is a component of an atomic nucleus with a mass defined as 1 and a charge of +1. A proton is indicated by either the symbol p or p +. The atomic number of an element is the number of protons an atom of that element contains. Because both protons and neutrons are found in the atomic nucleus, they are collectively known as nucleons. 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 atomic number or proton number is defined as the total number of protons in the nucleus and is given the symbol Z. The number of electrons in an electrically-neutral atom is the same as the atomic number. The total electrical charge of the nucleus is therefore +Ze. Source: chemwiki.ucdavis.edu. 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. Protons are tiny subatomic particles that, along with neutrons, form the nucleus of an atom. The heavier the atom, the more protons (and neutrons) it contains. Hydrogen, which is the A proton is a subatomic particle with a positive electrical charge found within the atomic nucleus of atoms . The number of this sub-particle in the atomic nucleus determines the atomic number. The chemical elements are ranked in the periodic table of the elements accordingly to the atomic number. A proton is one of three main particles that make up the atom. Protons are found in the nucleus of the atom. This is a tiny, dense region at the center of the atom. Protons have a positive electrical charge of one \(\left( +1 \right)\) and a mass of 1 atomic mass unit \(\left( \text{amu} \right)\), which is about \(1.67 \times 10^{-27}\) kilograms. 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. 0XING.