The first element in the formula is simply listed using the name of the element. The “n” is usually a low integer though it is possible for fractional values to exist. No prefixes are used when naming ionic compounds. The Greek prefixes used in naming hydrates for numbers 1/2 through 10 are as follows: 1/2: hemi- The second element is named by taking the stem of the element name and adding the suffix -ide. Covalent molecules use prefixes in their naming system to indicate the number of atoms of each element Prefixes are used in the names of binary compounds to indicate the number of atoms of each nonmetal present. NAMING COVALENT COMPOUNDS. In general, the prefix mono- is rarely used. Therefore, in a monohydrate “n” is one; in a hexahydrate “n” is 6, and so on. The prefixes are the same Greek prefixes used in naming molecular compounds. Covalent Compounds Answers Binary covalent compounds —that is, covalent compounds that contain only two elements—are named using a procedure similar to that used to name simple ionic compounds, but prefixes are added as needed to indicate the number of atoms of each kind. Naming binary (two-element) covalent compounds is similar to naming simple ionic compounds. Answers – Naming Chemical Compounds Al is a metal, so the elements are held together by ionic bond. The use of prefixes is a more convenient and expedient means of naming covalent compounds. The difference between naming ionic & covalent compounds Covalent Bonds Example: What is the name for N2F6? For example, N2O4 is "dinitrogen tetroxide." When is the only time you don't use prefixes when naming covalent compounds? Covalent compounds result from the sharing of electrons, and thus have different properties than ionic compounds (which result from a transfer of electrons). Learn with flashcards, games, and more — for free. Here are the prefixes most often used in covalent compounds: mono=1 di=2 tri=3 tetra=4 penta=5 hexa=6 hepta=7 octa=8 nona=9 deca=10. If it's a diatomic molecule like H2 If it's the first element in the compound and there is only one present If it's a diatomic molecule or if it's the first element in the compound and there is only one present You always use prefixes in all covalent compounds The following table lists the most common prefixes for binary covalent compounds. In naming covalent compounds, each element in a covalent compounds needs a prefix to denote the number of atoms of that element. Take nitrogen and oxygen molecules: NO, NO2, N2O, N2O4, and many other combinations are possible. prefixes used in naming elements in covalent compounds. When writing the formula of a covalent compound, simply look at the prefixes and write the subscripts that correspond to each prefix (but after the element symbol, of course). Boron is a metalloid/non-metal, so forms covalent bonds with non-metals to make a molecule. So to recap: use prefixes when naming covalent compounds, but not when naming ionic compounds. Dinitrogen Hexafluoride Between two NONMETALS Sharing of Electrons Change endings of the last element to -ide Are named by Greek prefixes: (Goes in the front of name) Binary covalent compounds are compounds made up of only two elements, such as carbon dioxide. Covalent compounds share electrons and the results is a much more complex arrangement of electrons and hence molecules. These prefixes are Greek (mon-, di-, tri-, etc) and the last element in the formula also gets the suffix "-ide." Naming Covalent Compounds. Prefixes for binary covalent compounds share electrons and the results is a metalloid/non-metal, so covalent. The name of the element name and adding the suffix -ide arrangement of electrons and the results a! 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