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ionization potential

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noun Physics.
  1. the energy required to remove an electron from an atom.
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Origin of ionization potential

First recorded in 1910–15
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for ionization potential

ionization potential

noun
  1. the energy usually required to remove an electron from an atom, molecule, or radical, usually measured in electronvoltsSymbol: I Compare electron affinity
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012