Electron affinity is the energy change associated with the addition of an electron to a gaseous atom (unit: kJ/mol or eV). X (g) + e- X-(g) Electron Affinities (kJ/mol) H H--72 Li Li--57 Na Na--21 He He-54 Be Be-66 Mg Mg-67 B B--15 Al Al--26 C C--121 Si Si--135 N N-31 P P--60 O O--142 S S--200 O- O 2-702 S- S 2-332 F F--333 Cl Cl--348 Br Br--324 I I--295 Ne Ne-99 [Note: 1. Because two different conventions have been used, there is good deal of confusion in the chemical literature about the signs for electron affinity values. Electron affinity has been defined in many textbooks as the energy
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This note was uploaded on 11/20/2010 for the course CHEMISTRY Chem 1A Di taught by Professor Rameshdarasasingham during the Spring '10 term at UC Irvine.