Chemical Nomenclature

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Presentation transcript:

Chemical Nomenclature Covalent Compounds

Molecular Compounds Covalent bonds occur between two nonmetals. Compounds made up of only nonmetals are called molecular compounds

Molecular Compounds The same elements can often bond in several ways with each other: For example, Carbon and Oxygen can combine as CO, a poisonous gas, and CO2, the gas you exhale when breathing. So, molecular compound names must specify how many of each atom participate in the compound.

Molecular compounds Prefix Number of Atoms Mono- 1 Hexa- 6 Di- 2 Hepta- 7 Tri- 3 Octa- 8 Tetra- 4 Nona- 9 Penta- 5 Deca- 10

Molecular Compounds Keys to remember: The mono- prefix is only applied to the second element. The more electronegative element is listed second. All compounds end in -ide

Dinitrogen Tetrahydride Dihydrogen monosulfide Nitrogen monoxide Practice Write the names for the following compounds: N2H4 H2S NO CBr4 Dinitrogen Tetrahydride Dihydrogen monosulfide Nitrogen monoxide Carbon tetrabromide

Disulfur decafluoride Diphosphorus trichloride SiF2 NF3 S2F10 P2Cl3 Practice Write the formulas for the following compounds: Silicon difluoride Nitrogen trifuoride Disulfur decafluoride Diphosphorus trichloride SiF2 NF3 S2F10 P2Cl3