1. Subscripts, Superscripts and Coefficients

2. Al 3 (SO 4 ) 2 coefficient subscripts superscripts ALUMINUM SULFATE SO 4 3- Al 2+ 5

3. Subscripts, Superscripts and Coefficients MgSO 4 MAGNESIUM SULFATE SO 4 2- Mg 2+ 3

4. Subscripts, Superscripts and Coefficients subscript MAGNESIUM NITRATE NO 3 1- Mg 2+ 4 2 MgNO 3 Mg(NO 3 ) 2

5. Interpretation of a Chemical Formula Sulfuric Acid H 2 SO 4 Two atoms of hydrogen One atom of sulfur Four atoms of oxygen H H O S O O O

6. Chemical Formulas C 8 H 18 Subscript indicates that there are 8 carbon atoms in a molecule of octane. Subscript indicates that there are 18 hydrogen atoms in a molecule of octane. Davis, Metcalfe, Williams, Castka, Modern Chemistry, 1999, page 203

7. Stock System of Nomenclature CuCl 2 Name of Roman cation numeral indicating charge Name of anion + copper (II)chloride

8. Chemical Formulas Al 2 (SO 4 ) 3 Subscript 2 refers to 2 aluminum atoms. Subscript 4 refers to 4 oxygen atoms in sulfate ion. Subscript 3 refers to everything inside parentheses. Here there are 3 sulfate ions, with a total of 3 sulfur atoms and 12 oxygen atoms. Davis, Metcalfe, Williams, Castka, Modern Chemistry, 1999, page 204

9. Naming Binary Ionic Compounds Al 2 O 3 Name of cation Name of anion aluminum oxide Davis, Metcalfe, Williams, Castka, Modern Chemistry, 1999, page 207

10. The OLD System of Nomenclature CuCl 2 Name of Name of anion cation Cupric chloride -ic higher oxidation # -ous lower oxidation # + Davis, Metcalfe, Williams, Castka, Modern Chemistry, 1999, page 208