proton

The positively charged unit of the nuclear mass; protons form part (or in hydrogen-1 the whole) of the nucleus of the atom around which the negative electrons revolve. [G. ntr. of protos, first]

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pro·ton 'prō-.tän n an elementary particle that is identical with the nucleus of the hydrogen atom, that along with neutrons is a constituent of all other atomic nuclei, that carries a positive charge numerically equal to the charge of an electron, and that has a mass of 1.673×10-24 gram
pro·ton·ic prō-'tän-ik adj

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pro·ton (proґton) [Gr. prōton, from prōtos first] an elementary particle of positive charge which forms the nucleus of the ordinary hydrogen atom of mass 1; along with neutrons, protons form the nuclei of atoms of all other elements. The proton is the unit of positive electricity; it has one quantum of charge (1.6 Ч1019 coulomb), equivalent to the electron but of opposite polarity, and its mass is 1.67 Ч1027 kilogram, approximately that of the hydrogen ion. Symbol p.

Medical dictionary. 2011.

Look at other dictionaries:

  • PROTON — Avec le neutron, le proton est l’un des composants de base des noyaux d’atomes et il constitue lui même le noyau de l’atome d’hydrogène. C’est l’une des rares particules élémentaires stables, et l’on peut le considérer, avec l’électron et le… …   Encyclopédie Universelle

  • Proton — (p+) Klassifikation Fermion Hadron Baryon Nukleon Eigenschaften [1] Ladung 1 e …   Deutsch Wikipedia

  • Protón — Saltar a navegación, búsqueda Para otros usos de este término, véase Protón (desambiguación). Protón Estructura de quarks de un protón …   Wikipedia Español

  • proton — PROTÓN, protoni, s.m. Particulă elementară stabilă cu sarcină electrică pozitivă, care constituie nucleul atomului de hidrogen. – Din fr. proton. Trimis de oprocopiuc, 23.04.2004. Sursa: DEX 98  PROTÓN adj. v. protonic. Trimis de siveco,… …   Dicționar Român

  • proton — 1920, coined by English physicist Ernest Rutherford (1871 1937) from Gk. proton, neut. of protos first (see PROTO (Cf. proto )); supposedly because hydrogen was hypothesized as a constituent of all the elements. The word was used earlier in… …   Etymology dictionary

  • próton — s. m. Partícula carregada positivamente, um dos constituintes do núcleo dos átomos. • [Brasil] Plural: prótones ou prótons.   ‣ Etimologia: inglês proton, do grego prótos, os, on, primeiro   ♦ Grafia em Portugal: protão …   Dicionário da Língua Portuguesa

  • proton — [prō′tän΄] n. [ModL < Gr prōton, neut. of prōtos, first: see PROTO ] Particle Physics a nucleon carrying a positive charge equal to the negative charge of an electron and having a mass of c. 1.673 × 10 27kg ( c. 938.2796 MeV/c2, c. 1,836 times …   English World dictionary

  • Proton — (P. Latr., Proto Leach.), Gattung der Krustenthierfamilie Laemodipoda …   Pierer's Universal-Lexikon

  • Proton — См. Протон Термины атомной энергетики. Концерн Росэнергоатом, 2010 …   Термины атомной энергетики

  • protón — Partícula cargada positivamente que constituye un componente fundamental del núcleo de todos los átomos. El número de protones del núcleo de un átomo es igual al número atómico del elemento …   Diccionario médico

  • pròtōn — m 〈G protóna〉 fiz. elementarna čestica, barion, pozitivnog elementarnog električnog naboja, sastavni dio svake atomske jezgre …   Veliki rječnik hrvatskoga jezika

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