electron affinity

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.

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  • 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

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  • 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

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