Table 1.4 Difference between a Compound and a Mixture
1.2.1 Atomic Number and Mass Number
1.2.3 Relative Atomic Mass and Atomic Mass Unit
1.2.4 How to write a Chemical Formula and its significance
1.2.4.1 Empirical formula 1.2.4.2 Molecular Formula
1.2.5 Molecular Mass and Formula Mass
1.3 Chemical specie 1.3.1 Ions
1.3.1.1 Molecular Ion 1.3.1.2 Free Radicals
1.3.2 Types of Molecules
