English Vocabulary Flash Cards - Chemical Formulas @ englishpdf.com and englishteststore.com File 101 F2Zr zirconium fluoride F3Fe iron trifluoride F3Ga gallium trifluoride F3Gd gadolinium trifluoride F3Ho holmium trifluoride F3La lanthanum trifluoride F3Li3 trilithium trifluoride F3Lu lutetium trifluoride