electron affinity is the
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The electron affinity of an atom or molecule is defined as the amount of energy released when an electron is attached to a neutral atom or molecule in the gaseous state to form a negative ion.
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Electron affinity is the energy change that results from adding an electron to a gaseous atom.For,example when a fluorine atom in the gaseous state gains and electron to form-F-(g),the associated energy change is-328kJ/mol.
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