1 / 21

Molecular Compounds

Molecular Compounds. Writing Names and Formulas. Molecular Compounds. Molecular compounds are made of molecules. They are made by joining nonmetal atoms together into molecules. Naming is Easier. A molecular compound’s name tells you the number of atoms through the use of prefixes. Prefixes.

jaron
Télécharger la présentation

Molecular Compounds

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Molecular Compounds Writing Names and Formulas

  2. Molecular Compounds • Molecular compounds are made of molecules. • They are made by joining nonmetal atoms together into molecules.

  3. Naming is Easier • A molecular compound’s name tells you the number of atoms through the use of prefixes.

  4. Prefixes • 1 mono- • 2 di- • 3 tri- • 4 tetra- • 5 penta- • 6 hexa- • 7 hepta- • 8 octa- • 9 nona- • 10 deca-

  5. Prefixes • The name will consist of two words. Prefix name prefix name -ide • One exception is we don’t write mono- if there is only one of the first element.

  6. Prefixes • The following double vowels cannot be used when writing names: • (oa) • (oo)

  7. Example • NO2 • There is one nitrogen • mononitrogen • But, you cannot use mono- on the first element, so drop the prefix. • mononitrogen • nitrogen

  8. Example • NO2 • There are two oxygens • dioxygen

  9. Example • NO2 • dioxygen • You need the suffix -ide • diox ygen ide

  10. Example • NO2 • nitrogen dioxide

  11. Example • N2O • There are two nitrogens • dinitrogen • There is one oxygen • monooxygen

  12. Example • N2O • monooxygen • You cannot run (oo) together, so • monoxygen

  13. Example • N2O • monoxygen • You need the suffix -ide • monox ygen ide

  14. Example • N2O • dinitrogen monoxide

  15. Problem • Name the following molecular compounds. • Cl2O7 dichlorine heptoxide • CBr4 carbon tetrabromide

  16. Problem • Name the following molecular compounds. • CO2 carbon dioxide • BCl3 boron trichloride

  17. Naming Molecular Compounds • You will not need to criss-cross oxidation numbers. • Molecular compounds name tells you the number of atoms through the use of prefixes.

  18. Example • diphosphorus pentoxide • The name implies there are 2 phosphorous atoms and 5 oxygens. P2O5

  19. Example • sulfur hexaflouride • The name implies there is 1 sulfur atom and 6 fluorines. SF6

  20. Problem • Write the formulas for the following molecules. • tetraiodide nonoxide I4O9 NO3 • nitrogen trioxide

  21. Problem • Write the formulas for the following molecules. • carbon tetrahydride CH4 PF3 • phosphorus trifluoride

More Related