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Date: 4-7-2017
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Naming Covalent Compounds Made of Two Elements
Binary compounds are compounds made up of only two elements, such as carbon dioxide (CO2). Chemists use prefixes in the names of binary compounds to indicate the number of atoms of each nonmetal present. Table 6-2 lists the most common prefixes for binary covalent compounds.
In general, the prefix mono- is rarely used. Carbon monoxide is one of the few compounds that uses it. Take a look at the following examples to see how to use the prefixes when naming binary covalent compounds (I’ve italicized the prefixes):
✓ CO2: Carbon dioxide
✓ P4O10: Tetraphosphorus decoxide (chemists try to avoid putting an a and an o together with the oxide name, as in decaoxide, so they normally drop the a off the prefix)
✓ SO3: Sulfur trioxide
✓ N2O4: Dinitrogen tetroxide This naming system is used only with binary, nonmetal compounds, with one exception: MnO2 is commonly called manganese dioxide.
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العلماء الروس يطورون طريقة جديدة لإعادة تدوير النفايات البلاستيكية
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