![]() ![]() Hydrates contain a specific number of water molecules attached to them. Here is the table with the names and formulas of polyatomic ions:īaSO 3 – Barium sulfite, Na 2CrO 4 – Sodium chromate, KClO 4 – Potassium perchlorateĮxamples of compounds containing a transition metal with two possible charges:ĬuNO 3 – Copper(I) nitrate or Cuprous nitrateĬu(NO 3) 2 – Copper(II) nitrate or Cupric nitrateĭon’t forget to add the prefix hypo– (meaning “less than”) and per– ( “more than”) for oxyanions with more than two formulas. In this video, we'll walk through this process for the ionic compound calcium bromide. Students need to correctly name or identify a compound from its name, especially when. Naming compounds is an essential skill in chemistry. Finally, combine the two ions to form an electrically neutral compound. Apply a systematic set of rules (IUPAC) for naming compounds and writing chemical formulas (e.g., binary covalent, binary ionic, ionic compounds containing polyatomic ions). Then, identify the anion and write down its symbol and charge. The same principle of listing the names of the cation followed by the name of the anion applies to naming ionic compounds with polyatomic ions. To find the formula of an ionic compound, first identify the cation and write down its symbol and charge. The names and formulas of metals forming different cations are summarized in the table below:įeCl 3 – Iron(III) chloride or Ferric chlorideįeCl 2 – Iron(II) chloride or Ferrous chloride The suffix for the cation with a higher charge is “ ic” and for the lower charge is “ ous”. If the compound contains a cation of a transition metal with two possible charges, then a Roman numeral or the corresponding suffix is used to indicate its charge. K 2S – Potassium sulf ide, CaBr 2 – Calcium brom ide, AlCl 3 – Aluminum chlor ide, MgO – Magnesium ox ide ![]() ![]() (Hydrogen is not a metal and is, therefore, an exception to the rule for group 1. Remember, group 1 and 2 cations inherit the name of the metal they are derived from, and monoatomic anions take the ending –ide. Although it is impossible to draw an exact line of demarcation, a good working rule is that essentially all binary compounds involving metals from periodic group 1, group 2, group 3 (Sc, Y, Lu), and the lanthanoids will be ionic. To name a binary ionic compound, identify the ions and list the cation first followed by the anion. The name of a binary ionic compound is: metal + nonmetal -ide If the metal has different oxidation states, the oxidation state is named. Once you know the names of the common ions, it is not difficult to name ionic compounds as we only need to put the names of the cation and the anion together.īinary ionic compounds are made of only two elements. In the previous post, we talked about naming monatomic (monoatomic) and polyatomic ions. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution License. We recommend using aĪuthors: Paul Flowers, Klaus Theopold, Richard Langley, William R. ![]() Use the information below to generate a citation. Then you must include on every digital page view the following attribution: If you are redistributing all or part of this book in a digital format, Then you must include on every physical page the following attribution: This set includes a bunch of binary compounds and it includes the compounds with transitional metals. Although it is impossible to draw an exact line of demarcation, a good working rule is that essentially all binary compounds involving metals from periodic group 1, group 2, group 3 (Sc, Y, Lu), and the lanthanoids will be ionic. If you are redistributing all or part of this book in a print format, Want to cite, share, or modify this book? This book uses the ![]()
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