Molecular Names and Formulas (Covalent Compounds)

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Presentation transcript:

Molecular Names and Formulas (Covalent Compounds)

Carbon and oxygen combine to form carbon monoxide (CO) and carbon dioxide (CO2), but these two invisible gases are very different. Carbon monoxide is an invisible, gaseous compound of carbon and oxygen. It is a toxic product of incomplete burning, such as occurs in automobile engines and faulty furnaces.

A prefix tells how many atoms of each element are present in one molecule. Number mono- 1 hexa- 6 di- 2 hepta- 7 tri- 3 octa- 8 tetra- 4 nona- 9 penta- 5 deca- 10 carbon monoxide (CO) carbon dioxide (CO2)

CCl4 SO3 H2O N2O Molecular Naming Rules: Name elements in formula order. Prefixes show the number of each atom. Suffix of last element is –ide. No prefix mono- for first element. N2O di mon nitrogen oxygen ide CCl4 SO3 H2O carbon tetrachloride sulfur trioxide dihydrogen monoxide

1. Which of the following compounds is named INCORRECTLY? Quick Quiz! 1. Which of the following compounds is named INCORRECTLY? CS2 carbon disulfide BCl3 boron trichloride IF7 iodine heptafluoride PCl5 phosphorus hexachloride

2. Which of the following molecular compounds is named INCORRECTLY? Quick Quiz. 2. Which of the following molecular compounds is named INCORRECTLY? PCl3 phosphorus trichloride C2O5 dicarbon pentoxide CF4 carbon tetrafluoride H3P hydrogen monophosphide

3. The correct formula for hexaphosphorus trisulfide is P7S3 S3P6 P6S3 Quick Quiz. 3. The correct formula for hexaphosphorus trisulfide is P7S3 S3P6 P6S3 S3P7

Prefix Number mono- 1 hexa- 6 di- 2 hepta- 7 tri- 3 octa- 8 tetra- 4 A prefix tells how many atoms of each element are present in one molecule. Prefix Number mono- 1 hexa- 6 di- 2 hepta- 7 tri- 3 octa- 8 tetra- 4 nona- 9 penta- 5 deca- 10