English Vocabulary Flash Cards - Chemical Formulas @ englishpdf.com and englishteststore.com File 063 CeI3 cerium(III) iodide CeN cerium nitride CeO2 cerium(IV) oxide or cerianite CeS cerium(II) sulfide Ce(SO4)2 cerium(IV) sulfate CeSi2 cerium silicide Ce2C3 cerium(III) carbide Ce2O3 cerium(III) oxide