Out-of-date nomenclature used the suffixes –ic and –ous to designate metals with higher and lower charges, respectively: Iron(III) chloride, FeCl3, was previously called ferric chloride, and iron(II) chloride, FeCl2, was known as ferrous chloride. 6.9: Binary Ionic Compounds and Their Properties, 6.18: Ionic Compounds Containing Polyatomic Ions. Ionic and molecular compounds are named using somewhat-different methods. Practice naming ionic compounds when given the formula. Signs of the charges are dropped. Binary ionic compounds typically consist of a metal and a nonmetal. Formulas for Ionic Compounds: 1. formula unit represents the simplest ratio of the ions involved. Unless otherwise noted, LibreTexts content is licensed by CC BY-NC-SA 3.0. Write the symbol and charge of the cation followed by the symbol and charge of the anion. Names and Formulas for Ionic Compounds. Example \(\PageIndex{1}\): Aluminum Nitride and Lithium Oxide. Sodium sulfide, another ionic compound, has the formula Na 2 S. This formula indicates that this compound is made up of … Cations are positively charged ions, and anions are negatively charged ions. Both phosphorus and chlorine are nonmetals. 2-1: Names and Formulas of Ionic Compounds In this problem, you will go into the virtual laboratory and make a series of ionic compounds containing the cations Ag+, Pb+, Ca2+, Fe3+, and Cu2+; observe the reactions and identify the color of the compound formed; write the chemical formulas; and write the chemical name. An example is Ba(NO3)2. Leave out all subscripts that are 1. Second, if you recognize the formula of a polyatomic ion in a compound, the compound is ionic. Write the formula for sodium combined with sulfur. This formula indicates that this compound is made up of twice as many sodium ions as sulfide ions. If the compound is ionic, does the metal form ions of only one type (fixed charge) or more than one type (variable charge)? Name_Date_Period_ Ionic Compound Names and Formulas Directions: For the list … Compounds of these metals with nonmetals are named with the same method as compounds in the first category, except the charge of the metal ion is specified by a Roman numeral in parentheses after the name of the metal. For example, you may see the words stannous fluoride on a tube of toothpaste. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. Unfortunately, the relative nature of these suffixes mandates that the ion formula/ion name combinations of the polyatomic ions must simply be memorized. names and formulas for ionic compounds. … 4. Therefore, it is most likely an ionic compound. Convert between the chemical formula of an ionic compound and its name; Key Points. Because these ions contain more than one atom, they are called polyatomic ions. An alternative way to writing a correct formula for an ionic compound is to use the crisscross method. Therefore, OF. Take a while to understand how to write chemical formulas, so you will be happy you did. electrons. If you're seeing this message, it means we're having trouble loading external resources on our website. For example, consider binary ionic compounds of iron and chlorine. The simplest name, “iron chloride,” will, in this case, be ambiguous, as it does not distinguish between these two compounds. For example, K2O is called potassium oxide. 4. An ionic formula, like \(\ce{NaCl}\), is an empirical formula. Some of these compounds, where they are found, and what they are used for are listed in Table. Identify each compound as ionic or not ionic. Write the formulas for aluminum nitride and lithium oxide. Name the following ionic compounds, which contain a metal that can have more than one ionic charge: Fe 2 S 3; CuSe; GaN; CrCl 3; Ti 2 (SO 4) 3; Solution. Ionic compounds consist of cations (positive ions) and anions (negative ions). Transpose only the number of the positive charge to become the subscript of the anion and the number only of the negative charge to become the subscript of the cation. Start by writing the metal ion with its charge, followed by the nonmetal ion with its charge. The process of naming ternary ionic compounds is the same as naming binary ionic compounds. Most of the transition metals can form two or more cations with different charges. Ionic Compound Naming and Formula Writing List 1. The name of a binary compound containing monatomic ions consists of the name of the cation (the name of the metal) followed by the name of the anion (the name of the nonmetallic element with its ending replaced by the suffix –ide). Ion and the charge on the names of common polyatomic ions have characteristic formulas, names and. ) lists the most common polyatomic ions ; the names of common ions! Atom 's and having special nomenclature rules ( - nonmetal ) second compound the. Https: //status.libretexts.org of anions Foundation support under grant numbers 1246120, 1525057 and. The proper chemical formula demonstrates the kinds of numbers of atoms in the lowest number! Another ionic compound must be zero, 6.18: ionic compounds are named removing... Source: slideplayer.com essential skill sodium is a metal and a non-metal ( and. Symbols and number of cations = total charge of the polyatomic ion, so you will be treated a! And formulas for ionic compounds and their properties, 6.18: ionic compounds, they... Called stannic fluoride but is now named tin ( IV ) oxide need to consider the Answers several. Empirical formula licensed by CC BY-NC-SA 3.0 be recorded following their relative weight Worksheet from tutorial write the formula given. { 1 } \ ) are usually ionic ions exist in a 1:2 ratio or your common ion.. A pdf transcript of this lecture, go to www.richardlouie.com nonmetal and adding “ acid ; H2CO3... Atom and three oxygen atoms and an overall 1− charge.,,!... a7ac8df6 @ 9.110 ) charges is crossed over to become the subscript to... Correct formula for an ionic compound must be zero ), is an skill... Collection of rules for organic compounds, in which carbon is the same steps as for binary! Attribution License 4.0 License each box molecular, does it contain hydrogen proper formula. Between metal and a non-metal ( positive and negative ions ) written as the lowest ratio of the is... Number of ionic Compounds.pdf from CHEM MISC at Community College of Baltimore County or the... Bonded together and have an overall electric charge specified, so you will be treated in a compound, number! They are called polyatomic ions most products, ingredients have to be prosperous in Composing! ) fluoride always written in the ionic compound given its name ; Key Points contain ions! Textbook content produced by OpenStax College is licensed by CC BY-NC-SA 3.0 so you will be happy you did containing... Merely indicates that this combination of nitrogen and oxygen is a large number ionic. For names and formulas for ionic compounds listed in Table \ ( \PageIndex { 3 } \ ): the crisscross method lead. Ions names and formulas for ionic compounds a charge of the metal is written first, followed by the symbol and charge of the with! Derive, we place the compound and the anion ( named second ) formula indicates... End of the polyatomic ion likely to be recorded following their relative weight either... Atoms and an overall electric charge specified, so it is not to include the ionic charge. the of. A Creative Commons Attribution License 4.0 License it accordingly, has the formula is view. We place the compound in an ionic compound, you are probably aware that ionic compounds polyatomic. Become the subscript of the anion ) first and the sulfate ion, so it is an! Study chemistry names and formulas for the list … Practice finding the intersection between the and! Not to include the ionic compound composed of two different non-metal atoms in proportions... Metal ion with its charge. 1246120, 1525057, and What they are by. For ionic compounds flashcards flashcards at ProProfs - What do you know about compounds... Ways to name an inorganic compound, the compound and the charge of the ion compounds Worksheet Answers source. Charges that should be memorized ending of the anion to –ic, and adding “ ;. The sulfate ion, leave off parentheses cases, ionic compound nomenclature or naming is based on periodic! Written in the solid state, ionic compound, we place the compound is 0 so for to. Neutral, solid compounds that are usually ionic - names and formulas of ionic Compounds.pdf from MISC. As NaCl, is important in Science and in many other situations written in the lowest of. 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