See if you need prefixes. A binary ionic compound is a compound composed of a monatomic metal cation and a monatomic nonmetal anion. Created by. Rules for naming ionic compounds: Always name the metal ion first. Naming Ionic Compounds In science, it is important to have a system that we can follow in naming things. Weak bases made of ionic compounds are also named using the ionic naming system. Table of Polyatomic Ions . The cation, Fe, has a charge of +2, the systematic name of iron is iron(II), and its common name is ferrous, so that is the name of the metal. Match. STUDY. When naming ionic compounds, the cation retains the same name as the element. Chemical Nomenclature is the systematic naming of chemical compounds. Change the ending of the nonmetal or second element by adding -ide. For example, NaOH is sodium hydroxide, KOH is potassium hydroxide, and Ca (OH) 2 is calcium hydroxide. Naming Ionic Compounds . succeed. i. Cation formula _ ii. When you name ionic compounds, you write the name of the metal first and then the nonmetal. just create an account. - Practicing until it becomes second nature. The second system, called the common system, is not conventional but is still prevalent and used in the health sciences. Log in here for access. Chloride always has a 1− charge, so with two chloride ions, we have a total negative charge of 2−. You learn by doing. Working Scholars® Bringing Tuition-Free College to the Community. The metal cation is named first, followed by the nonmetal anion as illustrated in Figure \(\PageIndex{1}\) for the compound BaCl2. Naming compounds have never been so simple! Name the metal first followed by the nonmetal with the ending -ide. Monoatomic cations take their name from the element name. Transition metals are found in groups 3-12 in the periodic table. However, we must pick the correct name for the transition metal, depending on its charge. The metal. There are two ways to make this distinction. PLAY. Write the names of the following compounds: Si(F)4, (Ag)3P(O)4, CO, (P)4, Si(O)2, N(H)3, (Na)2C(O)3, silicon tetrafluoride, silver phosphate, carbon monoxide, phosphorous, silicon dioxide, ammonia, sodium bicarbonate. Write formulas for the following compounds: diboron tetrahydride, gallium chloride, diphosphorus pentoxide, dinitrogen trioxide, phosphorous trifluoride, aluminum hydroxide, zinc sulfide, (B)2(H)4, Ca(Cl)3, (P)2(O)5, (N)2(O)3, P(F)3, Al(OH)3, ZnS. Now that we know how to name ions, we are ready to name ionic compounds. Create an account to start this course today. Polyatomic Ions- are molecules made up of 2 or more atoms that are considered an ionic group, that is, a molecule with a charge. 4 M ethanol c. 1 M KBr d. 4 M acetic acid, Write the empirical formula for at least four ionic compounds that could be formed from the following ions: a). {{courseNav.course.mDynamicIntFields.lessonCount}} lessons There is no space between the element name and the parenthesis. Ions (of either variety) may contain either a single element or more than one element. Ionic compounds are compounds composed of ions, chargedparticles that form when an atom (or group of atoms, in the case of polyatomicions) gains or loses electrons. If you are given a formula for an ionic compound whose cation can have more than one possible charge, you must first determine the charge on the cation before identifying its correct name. If the symbol for topaline is To, predict the formula of a compound that presumably would result from the reaction between magnesium and topaline, and name the compound. What type of compound is iron(III) oxide. ionic compounds. What is the Difference Between Blended Learning & Distance Learning? Lead(II) Nitrate. Rules for ionic compounds. In chemistry, there are rules we must follow in naming ionic compounds. A cationis a positively charged ion 2. The ions that make up an ionic compound are a cation, which is a positive ion, and an anion, which is a negative ion. This page was constructed from content via the following contributor(s) and edited (topically or extensively) by the LibreTexts development team to meet platform style, presentation, and quality: CK-12 Foundation by Sharon Bewick, Richard Parsons, Therese Forsythe, Shonna Robinson, and Jean Dupon. Rules for Naming and Writing Compounds I. Ionic Bonds • bonding between a metal and non-metal or the bond between a positive ion and a negative ion forming a binary compound. Identify and name the cation; the cation is the metal. Let's look at FeO as an example. Ionic compounds contain a metal … To get 6+, three iron(II) ions are needed, and to get 6−, two phosphate ions are needed . You can test out of the The cation is named first, followed by the anion. 2. Polyatomic means that these are ions having more than one atom of the same type. First of all, decide if the compound is ionic, covalent-molecular or an acid. The word ion is dropped from both parts. Name the cation (the more electropositive one) first and the anion (the more electronegative one) second. {{courseNav.course.topics.length}} chapters | For instance, in biology, there are rules that scientists follow in naming species. ClO_3^-, Based on extrapolation of your lab results, write the dissolution reaction for the ionic solids below. Ionic compounds are named by stating the cation first, followed by the anion. Therefore, the number of cations and anions in an ionic compound must be balanced to make an electrically neutral molecule. credit by exam that is accepted by over 1,500 colleges and universities. The polyatomic ions have their own characteristic names, as discussed earlier. The common system uses two suffixes (-ic and -ous) that are appended to the stem of the element name. Table \(\PageIndex{1}\) lists the elements that use the common system, along with their respective cation names. Anyone can earn (When an ion consists of more than one element, we … 1. Example \(\PageIndex{5}\): Naming Ionic Compounds. Here are a few other examples: Polyatomic ions are positively or negatively charged ions made of two or more atoms from different elements. The name of this ionic compound is potassium chloride. Here we write it on the same line; no subscripts!) imaginable degree, area of Select a subject to preview related courses: Transition metals can form more than one cation. We will consider three types: Ionic Compounds Without a Transition Metal. Binary ionic compounds, just like the name suggests, only have two atoms from different elements; one atom is a metal, and the other atom is a nonmetal. Thus, Fe2+ is called the iron(II) ion, while Fe3+ is called the iron(III) ion. Marisa Alviar-Agnew (Sacramento City College). Unless otherwise noted, LibreTexts content is licensed by CC BY-NC-SA 3.0. NH_4^+, c). - Applying the rules for naming or formula writing for that type of compound. 1. Get access risk-free for 30 days, These examples are shown here: How do we know that the ionic compound NaCl is called sodium chloride, and Mg(OH)2 is magnesium hydroxide? Please explain how to get to the correct answer not just the formula. The name of the first element remains the same. Ionic compounds, just like the name suggests, are made of ions, which are charged particles formed when electrons are transferred between atoms of different elements. We are going to focus our attention on ionic compounds. Identify and name the anion, and change the suffix to -ide; the anion is the nonmetal. Log in or sign up to add this lesson to a Custom Course. These are two different compounds that need two different names. One example is the ammonium sulfate compound in Figure \(\PageIndex{6}\). Missed the LibreFest? © copyright 2003-2020 Study.com. Here are some examples of polyatomic ions: When naming ionic compounds containing polyatomic ions, we follow the same general rule: Here are some examples of naming ionic compounds containing polyatomic anions: Ionic compounds are made of a cation (positive ion) and an anion (negative ion). In the first compound, the iron ion has a 2+ charge because there are two Cl− ions in the formula (1− charge on each chloride ion). In this lesson, we will learn how to name ionic compounds. Ternary compounds are composed of three or more elements. She has done research and teaching in mathematics and physical sciences. Thus, as we have already seen, Cl− is “chlor-” + “-ide ion,” or the chloride ion. Subscripts in the formula do not affect the name. After learning a few more details about the names of individual ions, you will be one step away from knowing how to name ionic compounds. We have seen that some elements lose different numbers of electrons, producing ions of different charges (Figure 3.3). Plus, get practice tests, quizzes, and personalized coaching to help you Naming Ionic Compounds Recall that ionic compounds consist of a positively charged cation and a negatively charged anion. All other trademarks and copyrights are the property of their respective owners. Another ionic compound, magnesium hydroxide, is made of a cation (Mg2+) and an anion (OH-). and career path that can help you find the school that's right for you. For example, consider FeCl2 and FeCl3 . The process of naming ionic compounds with polyatomic ions is the same as naming binary ionic compounds. Write. According to naming rules, the types of compound that use prefixes in their names are (C) polyatomic ions. The -ic suffix represents the greater of the two cation charges, and the -ous suffix represents the lower one. Rules for naming binary compounds containing metals with fixed ionic charges: 1. The elements at the left side of the stairs outlined in black are metals, and those on the right side of the stairs are nonmetals. What is the correct name of the compound Pb(NO3)2 . We can tell this from its position in the periodic table. Monatomic cations (a single atom with a positive charge) take the name of the element plus the word "ion" Examples: Na + = sodium ion Zn +2 = zinc ion If an element can form more than one (1) positive ion, the charge is indicated by the Roman numeral in parentheses followed … Monoatomic anions take their names … Change the suffix to '-ide,' or use the polyatomic anion name. With my strategy and step by step examples, you will be naming compounds like a pro in no time! first two years of college and save thousands off your degree. c. Neither charge is an exact multiple of the other, so we have to go to the least common multiple of 6. Have questions or comments? To learn more, visit our Earning Credit Page. PO_4^3-, b). In many cases, the stem of the element name comes from the Latin name of the element. Express your answers as chemical formulas separated by a comma. Rule 1. Rules for Naming Ionic/Covalent Compounds. More Practice With Naming . 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