In this chemistry lesson, students explored the concept of periodicity with a focus on alkali metal trends and their typical non-metallic properties. The lesson reinforced understanding of periodic trends, such as the increase in outer shell electrons along a period, the transition from metallic to non-metallic characteristics, and the reactivity trends in groups, particularly highlighting the alkali metals in Group 1. Additionally, the types of bonding, including ionic and covalent bonding based on the electron exchange between metals and non-metals, were thoroughly discussed.