History of the Periodic Table

This video provides a historical account of how the periodic table was developed. The video highlights the challenges faced by chemists during the 19th century in trying to order the newly discovered elements due to a lack of knowledge about what an atom was, incomplete knowledge of the elements, and the presence of compounds. It shows how chemists gradually identified patterns in the chemical properties of elements, leading to the development of tables by scientists like John Dalton, Johann Dobereiner, John Newlands, and Dmitri Mendeleev. The video also highlights how the discovery of the proton by Henry Moseley and subsequent validation of Mendeleev's table allowed scientists to build up the modern periodic table known today.