Picking lons, Writing Formulas and Naming Compounds Directions: You will be randomly picking ions, then writing their formula and compound name. Devise a way to randomly (flip a coin, roll of a dice, close eyes and point, etc.) pick a cation from groups 1, 2 or 3, anions from groups 5, 6 or 7 and polyatomic anions from the polyatomic chart. For 1 - 7 use monatomic cations and anions Positive monatomic ions have the name of the element from which they form. K--> Potassium Be2+ --> Beryllium Negative monatomic ions are named by giving the suffix of -ide to the stem of the name of the element. O2 --> Oxide Cl --> Chloride Example Compounds KO --> Potassium Oxide BeCl2 --> Beryllium Chloride For 8-12, use negative polyatomic lons for your anions. . Most are negative and end in a variety of suffixes. Use 5 negative polyatomic ions that end in suffixes such as - ate or - ide Example Compounds K(OH)2 -> Potassium Hydroxide Bez(PO )2 -> Beryllium Phosphate Cation Be2+ Anion PO, Chemical Formula Be(PO4)2 Chemical Name Beryllium Phosphate # Ex. 1 2 3 4 5 6 7 8 9 10 11 12