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.