Lecture
This lecture covers the periodic trends in the elements of the periodic table, focusing on atomic structure, electronic configurations, and the Aufbau principle. It discusses exceptions to the Aufbau principle, such as the stability of half or fully filled d orbitals. The lecture also explores the concepts of atomic radius, ionization energy, electron affinity, and electronegativity, highlighting the variations in properties across different elements. Through the analysis of experimental data and theoretical calculations, the instructor explains the factors influencing the chemical behavior of elements and their placement in the periodic table.