In 1800 only 31 elements were known. By 1865 the number of elements identified were more than 63. At present 118 elements are known. With such a large number of elements, it is very difficult to study each element individually. To make it easy scientists proposed a systematic way to organise the elements.
Content
Why do we Need to Classify Elements?
Genesis of Periodic Classification
Modern Periodic Law and the present form of the Periodic Table
Nomenclature of Elements with Atomic Numbers > 100
Electronic Configurations of Elements and the Periodic Table
Electronic Configurations and Types of Elements: s-, p-, d-, f- Blocks
Periodic Trends in Properties of Elements