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Binary Covalent Compounds Naming Rules & Examples

Learn the rules for naming binary covalent compounds made of two non-metals with covalent bonds. Follow the guidelines for naming the first and second element, using Greek prefixes to indicate the number of atoms for each element.

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Binary Covalent Compounds Naming Rules & Examples

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  1. Names and Formulas of Binary Covalent Compounds • Composed of covalent bonds (2 non-metals). Rules: • First element (the one with lower electronegativity= farthest to the left or lowest in the group) is written first with the full name. • The second element has the ending –ide • Greek prefixes are used to indicate the number of atoms for each element. EXCEPT: Mono- is not used on the first element (ex. C2O2 is dicarbon dioxide while CO2 is carbon dioxide)

  2. Prefixes show the number of each atom

  3. Some examples with the first 5 prefixes Name the following molecules: 1. CO2 2. PCl3 3. BrF 1. Carbon dioxide 2. Phosphorous trichloride 3. Bromine monoflouride

  4. 4. nitrogen dioxide 5.dinitrogen monoxide 6. dinitrogen pentoxide 7. sulfur hexaflouride 8. Tetraphosphorous decoxide Examples: 4. NO2 5. N2O 6. N2O5 7. SF6 8. P4O10

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