electron affinity

the quantitative measure, usually given in electron-volts, of the tendency of an atom or molecule to capture an electron and to form a negative ion.

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      in chemistry, the amount of energy liberated when an electron is added to a neutral atom to form a negatively charged ion. The electron affinities of atoms are difficult to measure, hence values are available for only a few chemical elements, chiefly the halogens. These values were obtained from measurements of heats of formation and lattice energies of ionic compounds of the elements. The electron affinity of an element is a measure of that element's tendency to act as an oxidizing agent (an electron acceptor) and is generally related to the nature of the chemical bonds the element forms with other elements.

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Universalium. 2010.

Look at other dictionaries:

  • Electron affinity — The electron affinity, E ea, of an atom or molecule is the energy required to detach an electron from a singly charged negative ion, i.e., the energy change for the process::X rarr; X + e−An equivalent definition is the energy released ( E… …   Wikipedia

  • electron affinity — elektroninis giminiškumas statusas T sritis Standartizacija ir metrologija apibrėžtis Dydis, proporcingas energijai, išsiskiriančiai atomui arba jonui prisijungus elektroną. atitikmenys: angl. electron affinity vok. Elektronenaffinität, f rus.… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • electron affinity — elektroninis giminiškumas statusas T sritis Standartizacija ir metrologija apibrėžtis Energijų skirtumas tarp laisvojo elektrono begalybėje ir elektrono, esančio dielektriko ar puslaidininkio laidumo juostos žemiausiame lygmenyje. atitikmenys:… …   Penkiakalbis aiškinamasis metrologijos terminų žodynas

  • electron affinity — elektroninis giminingumas statusas T sritis chemija apibrėžtis Dydis, proporcingas energijai, išsiskiriančiai arba sugeriamai atomui (jonui) prisijungus elektroną. atitikmenys: angl. electron affinity rus. сродство к электрону …   Chemijos terminų aiškinamasis žodynas

  • electron affinity — elektroninis giminiškumas statusas T sritis fizika atitikmenys: angl. electron affinity vok. Elektronenaffinität, f rus. электронное сродство, n pranc. affinité électronique, f …   Fizikos terminų žodynas

  • electron affinity — noun 1. : the degree to which an atom or molecule attracts additional electrons 2. : the minimum energy required to remove an electron from a negative ion to produce a neutral atom or molecule 3. : the negative of the energy required to introduce …   Useful english dictionary

  • electron affinity — the energy released when a single electron is combined with an isolated atom; its value is determined by the effective charge on the nucleus and the size and electronic configuration of the atom …   Medical dictionary

  • Electron affinity (data page) — Elements = Molecules References Many of the links to the full text of articles (linked from article titles) require subscription to the journal or payment. The links to abstracts are usually free of charge. *Andersen, H.H.; Petrunin, V.V.;… …   Wikipedia

  • electron affinity spectrum — elektroninio giminiškumo spektras statusas T sritis fizika atitikmenys: angl. electron affinity spectrum vok. Elektronenaffinitätsspektrum, n rus. спектр электронного сродства, m pranc. spectre d’affinité électronique, m …   Fizikos terminų žodynas

  • negative electron affinity — neigiamasis elektroninis giminiškumas statusas T sritis radioelektronika atitikmenys: angl. negative electron affinity vok. negative Elektronenaffinität, f rus. отрицательное сродство к электрону, n; отрицательное электронное сродство, n pranc.… …   Radioelektronikos terminų žodynas

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