Naming Molecular Compounds

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Covalent Nomenclature Naming Molecular Compounds.

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Presentation transcript:

Naming Molecular Compounds Chemical Bonding

Lewis Structures - + Nonpolar Covalent - no charges Polar Covalent - partial charges + -

What to know about Covalent Bonds Covalent molecules are made up of? The electrons are being?

How to write names and formulas Prefix System (binary compounds) How do we recognize these? Because they’re made up of 2 nonmetals? Where are nonmetals found??? Add prefixes to indicate # of atoms. Omit mono- prefix on first element. 3. Change the ending of the second element to -ide.

Molecular Nomenclature PREFIX mono- di- tri- tetra- penta- hexa- hepta- octa- nona- deca- NUMBER 1 2 3 4 5 6 7 8 9 10

Special Rules with Mono- If there is only one of the first element, then the prefix mono is not used. If there is only one of the second element, then the prefix mono is necessary. Ex. CO – Carbon Monoxide CO2 – Carbon Dioxide C2O – Dicarbon Monoxide

Also…. CH2 - Carbon Dihydride N3O6 - Trinitrogen Hexaoxide There is no simplifying for covalent compounds. What you see is what you get. If you simplify, you would change the chemical formula and ratio of the elements in the bond….Not good…. C2H4 - Dicarbon Tetrahydride CH2 - Carbon Dihydride N3O6 - Trinitrogen Hexaoxide NO2 - Nitrogen Dioxide

Writing Names Practice CCl4  Carbon Tetrachloride Formula Name CF4 H2O NH3 SiO2 PH3

Writing Formulas Practice CCl4  Carbon Tetrachloride Formula Name Nitrogen monoxide Tetraphosphorous pentaoxide Dicarbon Diiodide Trinitrogen Hexoxide Heptachlorine Nonahydride

Molecular Nomenclature The Seven Diatomic Elements Br2 I2 N2 Cl2 H2 O2 F2 H N O F Cl Br I