What distinguishes an aromatic hydrocarbon from an aliphatic hydrocarbon? Covalent inorganic compounds are named by a procedure similar to that used for ionic compounds, using prefixes to indicate the numbers of atoms in the molecular formula. The prefix. … According to naming rules, the types of compound that use prefixes in their names are (C) polyatomic ions. In general, the prefix mono- is rarely used. The procedure, diagrammed in Figure 2.13 consists of the following steps: Figure 2.13 Naming a Covalent Inorganic Compound. Rules for naming simple covalent compounds: 1. Second element is named as an Anion (suffix "-ide") 3. The Learning Objective of this Module is to name covalent compounds that contain up to three elements. B If the compound contains oxygen, follow step 3a. Covalent compounds have a completely different naming system than ionic compounds. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. google_ad_width = 468; Naming binary (two-element) covalent compounds is similar to naming simple ionic compounds. The prefixes are as follows. The structures of some of the compounds in Example 8 and Example 9 are shown in Figure 2.14 along with the location of the “central atom” of each compound in the periodic table. 9. 2. 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.The procedure, diagrammed in Figure 6.1.1, uses the following steps: For example, for CO the name will be carbon monoxide, and the final o of mono is dropped. , Naming Covalent Compounds   Naming Binary Ionic Compounds  Polyatomic Ions Naming with Polyatomic Ions  Naming with Roman Numerals  Formula Writing  Naming Acids. Using R to represent an alkyl or aryl group, show the general structure of an. Can an inorganic compound be classified as a hydrocarbon? Second element is named as an Anion (suffix "-ide"), 3. Name the other non-metal by its elemental name and an -ide ending. Start with the element at the far left in the periodic table and work to the right. In naming covalent compounds, each element in a covalent compounds needs a prefix to denote the number of atoms of that element. NO2 is nitrogen(IV) oxide and N2O4 is nitrogen(IV) oxide. Naming Covalent Compounds • When naming Covalent Compounds follow these IUPAC rules: 1. The following general formulas represent specific classes of hydrocarbons. You can write the formula for a covalent compound from its name by writing the symbols for the first and second elements and translating the prefixes into subscripts. What are the prefixes in naming covalent compounds? Would you expect PCl3 to be an ionic compound or a covalent compound? Remember, ionic compounds are metal combined with a non-metal. For more information contact us at info@libretexts.org or check out our status page at https://status.libretexts.org. Write the formula for each binary covalent compound. The "i" at the end of the prefixes "di-" and "tri-" are never dropped. The order of the elements in the name of BrF3, bromine trifluoride, is determined by the fact that bromine lies below fluorine in Group 17. Learn with flashcards, games, and more — for free. Identify the number of each type of atom in the chemical formula and then use Table 2.6 "Prefixes for Indicating the Number of Atoms in Chemical Names" to determine the prefixes needed. After mastering the material in Chapter 7 "The Periodic Table and Periodic Trends" and Chapter 8 "Ionic versus Covalent Bonding," one is able to predict the compositions and structures of compounds of this type with a high degree of accuracy. Naming Covalent Compounds Solutions Write the formulas for the following covalent compounds: 1) antimony tribromide SbBr3 2) hexaboron silicide B6Si 3) chlorine dioxide ClO2 4) hydrogen iodide HI 5) iodine pentafluoride IF5 6) dinitrogen trioxide N2O3 7) ammonia NH3 8) phosphorus triiodide PI3 Write the names for the following covalent compounds: Prefixes are added according to the molecular formula. Another system of naming is needed. Have questions or comments? The second non-metal element is named with the suffix “-ide” 3. Rules for Binary Covalent Compounds. Prefixes are used to show how many atoms of each element are present in the compound . 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. 1. Figure 2.14 The Structures of Some Covalent Inorganic Compounds and the Locations of the “Central Atoms” in the Periodic Table. For example, N2O4 is "dinitrogen tetroxide." Legal. eg. ” mono-” indicates one, “di-” indicates two, “tri-” is three, “tetra-” is four, “penta-” is five, and “hexa-” is six, “hepta-” is seven, “octo-” is eight, “nona-” is nine, and “deca” is ten. 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; e.g., "nonaoxide" would be written as "nonoxide", and "monooxide" would be written as "monoxide". Prefixes derived from Greek stems are used to indicate the number of each type of atom in the formula unit (Table 2.6 "Prefixes for Indicating the Number of Atoms in Chemical Names"). It may seem that the compositions and structures of such compounds are entirely random, but this is not true. Naming Covalent Compounds Covalent Compounds Unlike ionic compounds, which usually have a metal cation, covalent compounds are made of nonmetals. Covalent inorganic compounds are named using a procedure similar to that used for ionic compounds, whereas hydrocarbons use a system based on the number of bonds between carbon atoms. 3. For example, a molecule of chlorine trifluoride, ClF 3 contains 1 atom of chlorine and 3 atoms of fluorine. The following table lists the most common prefixes for binary covalent compounds. When naming molecular compounds prefixes are used to dictate the number of a given element present in the compound. 6. Rules for Naming Molecular Compounds. They are listed in the table to the right. The second element is named by taking the stem of the element name and adding the suffix -ide. You're comfortable naming covalent or molecular compounds and writing their formulas. To describe the composition of a chemical compound. Naming covalent compounds involves the use of Greek prefixes. RULES FOR NAMING COVALENT COMPOUNDS 1. 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