PROTON Definition & Meaning

proton

[proh-ton]

Phonetic (Standard)IPA

noun

Physics, Chemistry.

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. P

proton

/ ˈ��əʊ��ɒ�� /

noun

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

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

An elementary particle with a positive charge, found in the nucleus of an atom.

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Protons and neutrons make up most of an atom's mass.

A proton is over a thousand times heavier than an electron.

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Other 51�Թ� Forms

protonic adjective

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51�Թ� History and Origins

Origin of proton¹

Term first suggested in 1920 by English physicist Ernest Rutherford as noun use of Greek ��ô�ٴǲ�, neuter of ��ô�ٴǲ� “first,” the proton being the constituent of hydrogen nuclei, and formed on the analogy of electron; first, electron

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51�Թ� History and Origins

Origin of proton¹

C20: from Greek ��ō�ٴǲ� first

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Example Sentences

Examples have not been reviewed.

On X, where he has 4.7 million followers, he has channeled his pop-culture savvy and political outrage into a satirical sideshow, firing off punchlines like proton torpedoes.

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This is essentially a tension in the model where something doesn't add up when examining the nuclear force that binds together protons, neutrons and other particles.

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Their approach uses quantum information science to map out how particle tracks streaming from electron-proton collisions are influenced by quantum entanglement inside the proton.

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Finally elementary particles are protons, electrons, neutrons and all other particles that are smaller than an atom.

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The hydrogen atom — one proton, one electron — loves to hook up with other elements.

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protomorphic protonema

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