Chap 9 notes - to the root of the element name (e.g., fluor...

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Rules for Naming Binary Covalent Compounds A binary covalent compound is composed of two different elements (usually nonmetals). For example, a molecule of chlorine trifluoride, ClF 3 contains 1 atom of chlorine and 3 atoms of fluorine. Rule 1. The element with the lower group number is written first in the name; the element with the higher group number is written second in the name. Exception: when the compound contains oxygen and a halogen, the name of the halogen is the first word in the name. Rule 2. If both elements are in the same group, the element with the higher period number is written first in the name. Rule 3. The second element in the name is named as if it were an anion, i.e., by adding the suffix -ide
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Unformatted text preview: to the root of the element name (e.g., fluor ine = F, " fluor ide" = F-; sulf ur = S, " sulf ide" = S 2-). Rule 4. Greek prefixes are used to indicate the number of atoms of each element in the chemical formula for the compound. Exception: if the compound contains one atom of the element that is written first in the name, the prefix "mono-" is not used. Note: when the addition of the Greek prefix places two vowels adjacent to one another, the "a" (or the "o") at the end of the Greek prefix is usually dropped; for example, " nona oxide" would be written as " non oxide", and " mono oxide" would be written as " mon oxide". The "i" at the end of the prefixes "di-" and "tri-" are never dropped....
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This note was uploaded on 02/05/2012 for the course CHEM 115 taught by Professor L during the Fall '02 term at Purdue University-West Lafayette.

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