sia92-3notes - Matter Links: Science in Action Textbook (...

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Matter Links: Science in Action Textbook ( pgs. 139-153 ) Unit 2 Matter and Chemical Change 3.1 Naming Compounds ( pgs. 139-142 ) As you learned in the last section ( The Periodic Table ), each element has a chemical name. The combination of elements to form compounds has a chemical name and a chemical formula . The formula identifies which elements and how many of each are in the compound. For example: ethanol ( C 2 H 6 O ) has 2 carbon atoms, 6 hydrogen atoms and 1 oxygen atom To determine the name, a standardized chemical naming system, or nomenclature , is used. Guyton de Morveau in France developed it in 1787. The metal name is always first. Since 1920, the IUPAC ( International Union of Pure and Applied Chemistry ) is responsible for determining the appropriate name for each compound. Interpreting Chemical Names and Formulas From Compounds If you know the formula for a compound you can determine its chemical name – if you know its name, you can determine its formula. Write the chemical formula as determined by the name of the compound . (If a poly atomic ion is part of the formula, keep the poly-atomic ion intact) Aluminum oxide 2 - Al 3 - O Al 2 O 3 Calcium nitrite 1 - Ca 2 - NO 2 Ca(NO 2 ) 2 Sodium Chloride 1 - Na 2 – Cl 2 NaCl If the compound contains a metal the compound is ionic.
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sia92-3notes - Matter Links: Science in Action Textbook (...

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