![]() 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. Ions of metals in the first column of the periodic table (IA) will have a 1 charge. IONIC COMPOUND METALLIC ION NONMETALLIC ION Determining Charge on Cations (1) Metallic ions will have a positive 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. binary ionic compound contains an ion that is a metal (cation) and an ion that is a nonmetal (anion). Because of the ionic link binary ionic compounds have relatively. ![]() The nonmetallic part of the compound is named by dropping the end of the element and adding -ide. ![]() ![]() The metal part of the compound is named as the element. 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 A binary ionic compound is composed of ions of two different elements - one of which is a metal, and the other a nonmetal. In a binary ionic compound, the first atom is a metal, while the second atom is a nonmetal. Summary A binary ionic compound is a compound composed of a monatomic metal cation and a monatomic nonmetal anion. The suffix for the cation with a higher charge is “ ic” and for the lower charge is “ ous”. A binary ionic compound is composed of ions of two different elements - one of which is a metal, and the other a nonmetal. 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. There are two ways to make this distinction. K 2S – Potassium sulf ide, CaBr 2 – Calcium brom ide, AlCl 3 – Aluminum chlor ide, MgO – Magnesium ox ide Remember, group 1 and 2 cations inherit the name of the metal they are derived from, and monoatomic anions take the ending –ide. You might still see -ous and -ic suffixes, although they have been deprecated. 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. Binary ionic compounds are very common in nature and examples include everyday salts such as sodium chloride, or table salt, and potassium chloride. \) is given a subscript of 2.In the previous post, we talked about naming monatomic (monoatomic) and polyatomic ions.
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