Classification of elements - The periodic table

This topic includes the definition of an element given by Robert Boyle. It further describes some reasons for the need for the arrangement of elements. Moreover, it discusses some limitations of the earlier classification of metals and non-metals.

In this topic, we will learn about the early attempts of classification of elements. It also briefs on the Dobereiner's triads and Newlands law of octaves in detail.

This topic describes the history of Mendeleev and his achievements. It also describes the Mendeleev's periodic table and the limitations of Mendeleev's classification in detail.

In this topic, we shall study the modern periodic table in detail along with the position of elements in modern periodic table. We will also study about valencies and atomic size in detail.

Through this topic, we will learn how to analyse the properties of elements in groups and periods. It demonstrates the valency and atomic radius of an element. Ionization energy is also illustrated here with the aid of activities.