In this Unit, we will study the historical development of the Periodic Table as it stands today and the Modern Periodic Law. We will also learn how the periodic classification follows as a logical consequence of the electronic configuration of atoms. Finally, we shall examine some of the periodic trends in the physical and chemical properties of the elements. Here is the list of important URLs related to canvas classes Youtube Video Link: https://youtu.be/xYLLL8d989k Youtube Channel Link: https://www.youtube.com/canvasclasses Website Link: http://canvasclasses.in Facebook Page: https://www.facebook.com/canvasclasses/