Explore the foundations of atomic theory and chemical bonding in this comprehensive lecture. Delve into the historical development of atomic models, from Democritus to modern theories, and understand key experiments like the cathode ray tube and Millikan's oil drop. Examine atomic structure, elements, isotopes, and the periodic table. Learn about electron configurations and various types of chemical bonds, including ionic, covalent, and metallic. Investigate the crystalline structure of salts and differentiate between bond types. Gain insights into chemical properties of atoms and engage with a thought-provoking discussion on the nature of DHMO.