Covalent Nomenclature You will be able to recognize,write formulas and name covalent compounds. It’s so easy you will want to do everything this way!

Covalent Bonding Sharing of electrons Usually 2 nonmetals [H] No +/- attraction! CO2 N2O3 SO3 BH3

Greek Prefixes Naming of covalent compounds is based upon the use of Greek prefixes (just like hydrates) 1 mono- 2 di- 3 tri- 4 tetra- 5 penta- 6 hexa- 7 hepta- 8 octa- 9 nona- 10 deca-

Covalent Naming N2O3 PCl5 CO2 NO NI3 B2H6 1. Name the first element as the element. Add a prefix, unless there is only one of the atom. 2. Name the second element with the –ide ending. ALWAYS add a prefix to indicate the number of atoms. N2O3 PCl5 CO2 NO NI3 B2H6

Writing Formulas Diarsenic trioxide Carbon monoxide Dinitrogen pentoxide

Bonding by sharing electrons to get a full outside shell (s & p) NAMING IONIC Bonding by charges COVALENT Fixed metal 2 nonmetals M + NM M + PI Fixed: Groups 1-2 Al+3,Ag+1, Zn+2,Cd+2 VARIABLE Use Greek prefixes (2nd name always has prefix) Must include charge of metal as roman numerals Metal( ) + NM or PI

Names? As3O Li3N Cu3(PO4)2 N5O7

Formulas? Zinc sulfite Diphosphorous monoxide Nickel (III) nitride DON’T GET BURNED!