Chapter 4 Nomenclature

4.1 Naming Metal + Non Metal Compounds Forms a binary ionic compound Made up of a cation(+ charge) and an anion(- charge) Two types of compound Some metals form only one type of cation Other metals can form two or more cations that have different charges…We use a roman numeral after the cation name to indicate the charge.

4.1 continued Always name the cation first and the anion last Then take the name of the cation Then take the first part of the anion name and add –ide to it

4.2 Naming nonmetal Compounds First use the full name of the first element Use the second element like it is an anion Use a prefix located in chart 4.3 The –mono prefix is only ever used on the second element

4.4 Naming Compounds with Polyatomic Ions First use the name of the cation Then add the name of the anion

4.5 Naming Acids All acids contain hydrogen in them When hydrogen combines with a –ate polyatomic ion, it forms –ic When hydrogen combines with a –ite polyatomic ion, it forms a -ous

4.6 Writing Formulas From Names Some metals have two charges When a metal has more than one charge, you need to represent that charge in the name Use a roman numeral( ex II) next to the metal to show the charge You need to know the name of elements and Polyatomic ions