proton (ˈprəʊtɒn) n (General Physics) a stable, positively charged elementary particle, found in atomic nuclei in numbers equal to the atomic number of the element. It is a baryon with a charge of 1.602176462 × 10–19coulomb, a rest mass of 1.672 62159 × 10–27kilogram, ...
In addition to protons, the atoms of nearly every element also contain neutrons. The mass of a neutron is almost identical to that of a proton. Both are formally given an atomic mass number, A, of 1. The simplest, commonest form of hydrogen has a nucleus that consists of a single prot...
A proton is a positively charged particle that resides within the atomic nucleus. The number of protons in the atomicnucleusis what determines theatomic numberof an element, as outlined in theperiodic table of the elements. The proton has charge +1 (or, alternately, 1.602 x 10-19Coulombs),...
Proton definition: a positively charged elementary particle that is a fundamental constituent of all atomic nuclei. It is the lightest and most stable baryon, having a charge equal in magnitude to that of the electron, a spin of ½, and a mass of 1.673
Proton Definition A proton is a component of an atomic nucleus with amassdefined 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 ...
Also known as: proton number Written and fact-checked by The Editors of Encyclopaedia Britannica Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. Th...
Atoms are made up of three main particles: protons, electrons, and neutrons. A proton has a positive electrical charge, while electrons are negative. The number of protons and electrons is equal in each atom.
1 :a positive photograph or a print from a negative 2 :a positive result (as of a test) also:a test yielding such a result More from Merriam-Webster onpositive Nglish:Translation ofpositivefor Spanish Speakers Britannica English:Translation ofpositivefor Arabic Speakers ...
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Proton, stable subatomic particle that has a positive charge equal in magnitude to a unit of electron charge and a rest mass of 1.67262 x 10^-27 kg, which is 1,836 times the mass of an electron. Protons, together with electrically neutral particles calle