English Vocabulary Flash Cards - Chemical Formulas @ englishpdf.com and englishteststore.com File 084 DBr deuterium bromide DI deuterium iodide DLi lithium deuteride DNa sodium deuteride D2 O deuterium oxide or heavy water D3 O trideuterium oxide DyBr3 dysprosium(III) bromide DyCl2 dysprosium(II) chloride