Covalent compounds Helping students learn the names and formula of a range of covalent compounds. Simple drag and drop exercise. Drag the Chemical formula to their names Carbon monoxide Carbon dioxide Sulfur dioxide Sulfur trioxide Dinitrogen Tetroxide Dinitrogen monoxide Nitrogen dioxide Nitrogen monoxide Dinitrogen trioxide Dinitrogen pentoxide Sulfur hexafluoride Iodine heptafluoride Iodine trifluoride Carbon tetrafluoride Disulfur monoxide CO CO2 SO2 SO3 N2O4 N2O NO2 NO N2O3 N2O5 SF6 IF6 IF3 CF4 S2O