P3E1N1T1O1X8I1D2E1
19 points
PENTOXIDE is validvalid
an oxide containing five atoms of oxygen in each molecule; as, phosphorus pentoxide
an oxide containing five atoms of oxygen in each molecule; as, phosphorus pentoxide
an oxide containing five atoms of oxygen in each molecule; as, phosphorus pentoxide
an oxide containing five atoms of oxygen in each molecule; as, phosphorus pentoxide