1. 23. The Periodic Table 2For The Periodic Table: 1. Revision on across Period 3 Trends in Atomic Properties: Electronegativity 2. Revision on a across Period 3 Trends in Physical Properties: Melting point Electrical conductivity 3. Reactions of Period 3 Oxides with water and the resultant pH of the solutions. 4. Reactions of Period 3 Oxides (basic, amphoteric and acidic) with acid / base to form salt and water. 5. Reactions of Period 3 Chlorides with water focusing on the dissolution and hydrolysis processes and the resultant pH of the solutions.