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electron affinity

noun, Physics, Chemistry
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. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for electron affinity
  • Surfaces in different conditions have varying electron affinity, sure enough.
  • The electron affinity search looks for a species with a given electron affinity.
  • It involves averaging the magnitudes of the atomic ionization energy and the atomic electron affinity.
  • Likewise electron affinity is a also a positive number.
British Dictionary definitions for electron affinity

electron affinity

a measure of the ability of an atom or molecule to form a negative ion, expressed as the energy released when an electron is attached A
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Contemporary definitions for electron affinity

the amount of energy needed to remove an electron from a negatively charged ion; also, the energy released when a single electron is combined with an isolated atom's 21st Century Lexicon
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Encyclopedia Article for electron affinity

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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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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