Prefixes: covalent compound, 248 table

The table shows some of the prefixes used to name binary covalent compounds. What name would be given to the compound PBr5 ... 

Does the formula contain a metal (not hydrogen) If there s no metal, you re naming a molecular (covalent) compound, so you need to use the prefixes in Table 6-2. Be sure to change the ending of the second element to -ide. If there is a metal, then you re dealing with an ionic compound, so proceed to Question 3. 

Different systems are used for naming binary covalent compounds and ionic compounds, and acids are named still other ways. For binary nonmetal-nonmetal compounds (which are covalent), name the leftmost or lower element in the periodic table first, and then name the other element. Change the ending of the second element to -ide, and indicate the number of atoms of that element in the molecule by a prefix (Table 6.1). If more than one... 

Covalent compounds have Greek numerical prefixes (see Table 2.6) to indicate the number of atoms of each element in the compound. The first word has a prefix only when more than one atom of the element is present the second word usually has a numerical prefix. 

Chemical formulas describe the simplest atom ratio (empirical formula), actual atom number (molecular formula), and atom arrangement (structural formula) of one unit of a compound. An ionic compound is named with cation first and anion second. For metals that can form more than one ion, the charge is shown with a Roman numeral. Oxoanions have suffixes, and sometimes prefixes, attached to the element root name to indicate the number of oxygen atoms. Names of hydrates give the number of associated water molecules with a numerical prefix. Acid names are based on anion names. Covalent compounds have the first word of the name for the element that is leftmost or lower down in the periodic table, and prefixes show the number of each atom. The molecular (or formula) mass of a compound is the sum of the atomic masses in the formula. Molecules are depicted by various types of formulas and models. 

Table 8.3 Prefixes in Covalent Compounds Interactive Table Explore naming covalent compounds at qlencoe.com.

Binary compounds are compounds made up of only two elements, such as carbon dioxide (CO2). Prefixes are used in the names of binary compounds to indicate the number of atoms of each nonmetal present. Table 7-1 lists the most common prefixes for binary covalent compounds. 

Table 7-1 Common Prefixes for Binary Covalent Compounds...

For binary covalent compounds, the first word of the name is the element farther left or lower down in the periodic table, and prefixes show the numbers of each atom. 

Table 3.4 Example of Naming of Binary Covalent Compounds Using Prefixes ...

Some pairs of elements bound by covalent bonds can form more than one compound, i.e., CO and COj. One of the most interesting of these pairs are the compounds of nitrogen and oxygen. The system adopted for naming these compounds uses Greek prefixes. Table 3-2 illustrates the systematic method. Note that NO is called nitrogen monoxide, not mononitrogen monoxide, while CO is called... 

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