Do you know how many elements are known till date? At present, 118 elements are known to us. All these have different properties. Out of these 118, only 94 are naturally occurring. As different elements were being discovered, scientists gathered more and more information about the properties of these elements. They found it difficult to organize all that was known about the elements. They started looking for some pattern in their properties, on the basis of which they could study such numerous elements with ease.
- EARLY ATTEMPTS AT THE CLASSIFICATION OF ELEMENTS
- MENDELÉEV’S PERIODIC TABLE
- THE MODERN PERIODIC TABLE :-
- Position of Elements in the Modern Periodic Table
- Trends in the Modern Periodic Table
- Metallic and Non-metallic Properties