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What is the difference between electron affinity and ionization energy?

April 26, 2017affinity Chemistry difference electron energy ionization Mathematics

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What is the difference between electron affinity and ionization energy?

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EA is the energy given off when an electron is added to a gaseous atom. Note that energy is released, so this value is exothermic (negative enthalpy change) IE is the energy required to remove an electron from a gaseous element or ion. This is endothermic (positive enthalpy change).