Molecular compounds are made of nonmetals and cannot be held together by opposite charges like ionic compounds. To name molecular compounds, prefixes are used to indicate the number of atoms and the names of the elements are written with "-ide" at the end. Some common prefixes are mono-, di-, tri-, tetra-, etc. and to write the full name, the prefix, element name, prefix, element name, and "-ide" are written.

1. Naming Molecular Compounds

2. Molecular compoundsMade of just nonmetalsSmallest piece is a moleculeCan’t be held together because of opposite charges.Can’t use charges to figure out how many of each atom

3. EasierIonic compounds use charges to determine how many of each.Have to figure out charges.Have to figure out numbers.Molecular compounds name tells you the number of atoms.Uses prefixes to tell you the number

4. Prefixes1 mono-2 di-3 tri-4 tetra-5 penta-6 hexa-7 hepta-8 octa-

5. Prefixes9 nona-10 deca-To write the name write two words

6. Prefixes9 nona-10 deca-To write the name write two wordsPrefixnamePrefixname-ide

7. Prefixes9 nona-10 deca-To write the name write two words One exception is we don’t write mono- if there is only one of the first element.PrefixnamePrefixname-ide

8. Prefixes9 nona-10 deca-To write the name write two words One exception is we don’t write mono- if there is only one of the first element.No double vowels when writing namesPrefixnamePrefixname-ide

9. Name TheseN2ONO2Cl2O7CBr4CO2BaCl2

10. Write formulas for thesediphosphorus pentoxidetetraiodine nonoxidesulfur hexaflouridenitrogen trioxideCarbon tetrahydridephosphorus trifluoridealuminum chloride