Unit 3: Classification of elements & periodicity in properties

The periodic table is the everyday support for students, it suggests new avenues of research to professionals, and it provides a succinct organization of the whole of chemistry.

In this third unit of class 11, chemistry, we will study the historical development of the periodic table 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.