EntityQ271580· pop 47· linked from 180 articleselectron affinitySign in to saveamount of energy released when an electron is attached to a neutral atom or molecule in the gaseous state to form a negative ionGallery (2)ConnectionsblockEntityalkali metalEntityalkaline earth metalEntitynonmetalEntityperiodEntitygroupEntityInternational Union of Pure and Applied ChemistryEntityionization energyEntityIUPAC booksEntitygoldEntityironEntityatomEntityhydrogenEntitysilverEntityoxygenEntityPeriodic tableConceptcopperEntityenergyEntitycarbonEntityaluminiumEntityCategoriesAtomic physicsChemical bondingChemical propertiesIonsMolecular physicsPhysical chemistry