When naming ionic compounds, all of the information you’ll need is on the periodic table. CC BY-SA 3.0. http://www.chem1.com/acad/webtext/intro/int-5.html Ionic compounds consist of cations (positive ions) and anions (negative ions). For example, CuCl2 indicates a molecule where one Cu2+ cation associates with two Cl– anions to form a neutral compound. It is still common to see and use the older naming convention in which the prefix bi- is used to indicate the addition of a single hydrogen ion. The positively charged ion or cation comes before the negatively charged ion or anion. Identify the compound as an ionic compound first [begins with a metal and ends with nonmetal(s)]. Covalent or molecular compounds form when elements shareelectrons in a covalent bond to form molecules. Naming Ionic Compounds Containing Transition Metals If an ionic compound contains a transition metal, use Roman numerals to denote which ion it is. Naming monatomic ions and ionic compounds. A cation, which is a positively charged ion, and an anion which is negatively charged. 1. The net charge of an ionic compound must be zero. When working in chemistry, it is often convenient to write a chemical in symbols. Test. These anions are called oxyanions. This particular resource used the following sources: http://www.boundless.com/ CC BY-SA 3.0. http://en.wikipedia.org/wiki/ionic%20compound For example, Ca(NO3)2 is called calcium nitrate. In both systems, the name of the anion ends in -ide. CC BY-SA. Here are the principal naming conventions for ionic compounds, along with examples to show how they are used: A Roman numeral in parentheses, followed by the name of the element, is used for elements that can form more than one positive ion. Ionic/Covalent Compound Naming Solutions 1) Na 2 CO 3 sodium carbonate 2) P 2 O 5 diphosphorus pentoxide 3) NH 3 ammonia 4) FeSO 4 iron (II) sulfate 5) SiO 2 silicon dioxide 6) GaCl 3 gallium chloride 7) CoBr 2 cobalt (II) bromide 8) B 2 H 4 diboron tetrahydride 9) CO carbon monoxide 10) P 4 But to be considered an ion, they must carry a positive or negative charge. If the formula . Some of the worksheets for this concept are Naming ionic compounds practice work, Naming ionic compounds work i, Csus chemistry 1ae nomenclature work mack, Since we use different methods in naming binary covalent, Ionic compound formula writing work, Naming compounds practice work, Mixed ionic covalent naming, Rules for naming and writing compounds. “Calcium” The anion is an element (chlorine) Remove the –ine and add –ide “Chloride” Calcium is not a transition metal, so disregard step 3 Finally, write the name of the cation followed by the name of the anion. Naming Molecular Compounds Molecular compounds are named using a systematic approach of prefixes to indicate the number of each element present in the compound. Its systematic name is copper (II) chloride, where copper’s oxidation number is indicated in parentheses. For example, nitrate ion, NO 3-, contains one nitrogen atom and three oxygen atoms.The atoms in a polyatomic ion are usually covalently bonded to one another, and therefore stay together as a single, charged unit. CC BY-SA 3.0. http://en.wikipedia.org/wiki/ionic%20compound, http://www.chem1.com/acad/webtext/intro/int-5.html, http://en.wikipedia.org/wiki/Naming_ionic_compounds%23Naming_simple_ionic_compounds, http://en.wikipedia.org/wiki/Ionic_compound, https://www.boundless.com/chemistry/textbooks/boundless-chemistry-textbook/, Convert between the chemical formula of an ionic compound and its name. Review: Naming Ionic Compounds - Answers Write the formulas of the following ionic compounds (1 pt each): 1) iron (II) arsenide Fe 3 As 2 2) lead (II) sulfate PbSO 4 3) lead (IV) hydroxide Pb(OH) 4 4) copper (II) acetate Cu(C 2 H 3 O 2) 2 5) beryllium chloride BeCl 2 6) ammonium chromate (NH 4) 2 CrO 4 7) silver oxide Ag 2 O She has taught science courses at the high school, college, and graduate levels. Some polyatomic anions contain oxygen. Practice: Predict the charge on monatomic ions. Therefore, the number of cations and anions in an ionic compound must be balanced to make an electrically neutral molecule. Suppose that you want to name the compound that results from the reaction of lithium and sulfur. Because no other simpler formula is possible, there is no need to name it “calcium dibromide.” CaBr2 can be named using either the Stock method or the older, classic way of naming. With my strategy and step by step examples, you will be naming compounds like a pro in no time! One example is the ammonium Sulfate compound in Figure 5.7. Salts are simple inorganic binary ionic compounds. Wikipedia http://en.wikipedia.org/wiki/Naming_ionic_compounds%23Naming_simple_ionic_compounds Although Roman numerals are used to denote the ionic charge of cations, it is still common to see and use the endings -ous or -ic. The -ide ending is added to the name of a monoatomic ion of an element. Polyatomic anions sometimes gain one or more H+ ions to form anions of a lower charge. For example, Cu(NO3)2 is copper (II) nitrate, because the charge of two nitrate ions (NO3−1) is 2\cdot(-1) = -2. Ionic compounds are (usually) formed when a metal reacts with a nonmetal (ora polyatomic ion). When an element forms two oxyanions, the one with less oxygen is given a name ending in -ite and the one with more oxygen are given a name that ends in -ate. (When an ion consists of more than one element, we … Ionic compound nomenclature or naming is based on the names of the component ions. Wikipedia Here is some tips, and tricks for naming ionic compounds. Remember, they may be either ionic or covalent compounds, so make sure you use the right naming method! Boundless vets and curates high-quality, openly licensed content from around the Internet. Google Classroom Facebook Twitter. In all cases, ionic compound naming gives the positively charged cation first, followed by the negatively charged anion. Example: FeCl3 is ferric chloride or iron(III) chloride. At first you may incorrectly attempt to name every element in the formula. By sticking to each other, they resolve, or partially resolve, their separate charge imbalances. The net charge of an ionic compound must be zero. 1. The “ine” was removed and replaced with “ide.” To name a compound, the cation name and the anion named are added together. For cations that take on multiple charges (typically transition metals), the charge is written using Roman numerals in parentheses immediately following the element name. 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