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2014-12-14T09:46:12+05:30

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Electron gain enthalpy or electron affinity is the amount of energy released when an isolated gaseous atom accepts an electron to form monovalent gaseous anion.
It decreases along periods and increases along groups.
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2014-12-14T10:16:23+05:30
It is the enthalpy change when an electron is added to neutral gaseous atom form its negative ion. 
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