Naming Molecular Compounds How are the chemical formula and name of a molecular compound related?

Molecular Compounds Molecular Formula Number of Atoms of First Element Number of Atoms of Second Element Name of Compound CO2 Carbon dioxide Cl2O Dichlorine monoxide PCl5 Phosphorus pentachloride N2O5 Dinitrogen pentoxide Molecular compounds are composed of nonmetals bonded with nonmetals. Covalent bonding is present in molecular compounds. How do the names of the compounds relate to the number of atoms in the compound? What are some ways that all the listed compounds are similar? 1,2 2,1 1,5 2,5 The prefixes indicate the number of atoms for each element. They are all binary compounds, meaning the compound is made up of only two elements.

Prefixes & Suffixes Prefix Numerical Value mono- di- tri- tetra- penta- hexa- hepta- octa- nona- deca- Molecular Formula Name of Compound SF6 Sulfur hexafluoride IBr7 Iodine heptabromide Cl2O Dichlorine monoxide P4O10 Tetraphosphorus decoxide B5H9 Pentaboron nonahydride Br3O8 Tribromine octoxide All the compounds end in –ide. When there is only one atom of the first element in the compound. What suffix do all compounds share? When is a prefix not used for the first element?

Practice Naming Molecular Formula Name of Compound PBr3 SCl4 N2F2 SO3 BrF Disulfur decafluoride Carbon tetrachloride Oxygen difluoride Dinitrogen trioxide Tetraphosphorus heptasulfide Phosphorus tribromide Sulfur tetrachloride Dinitrogen tetrafluoride Sulfur trioxide Bromine monofluoride S2F10 CCl4 OF2 N2O3 P4S7

Mixed Naming Practice Molecular Formula Type of Compound/Bonding Name of Compound MgF2 CuF2 SF2 Sodium bromide Gold(I) bromide Iodine monobromide Ionic Magnesium fluoride Ionic Copper (II) fluoride Molecular/Covalent Sulfur difluoride NaBr Ionic AuBr Ionic Ibr Molecular/Covalent