Protons
noun, Physics, Chemistry.
1.
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 × 10− 27 kg. Symbol: P.
noun
1.
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 × 10–19 coulomb, a rest mass of 1.672 62159 × 10–27 kilogram, and spin 1/2
proton pro·ton (prō’tŏn’)
n.
A stable, positively charged subatomic particle in the baryon family having a mass 1,836 times that of the electron.
proton
(prō’tŏn’)
A stable subatomic particle in the baryon family having a mass of 1.672 × 10-24 grams (1,836 times that of the electron) and a positive electric charge of approximately 1.602 × 10-19 coulombs. Protons make up part of the nucleus of all atoms except hydrogen, whose nucleus consists of a single proton. In neutral atoms, the number of protons is the same as the number of electrons. In positively charged atoms, the number of protons is greater than the number of electrons, and in negatively charged atoms electrons outnumber protons. Protons are believed to be composed of two up quarks and one down quark. See Table at subatomic particle.
proton [(proh-ton)]
An elementary particle with a positive charge, found in the nucleus of an atom.
Note: A proton is over a thousand times heavier than an electron.
Note: Protons and neutrons make up most of an atom’s mass.
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