Class 11 Chemistry Element Classify Periodicity Introduction


There are 128 elements know till now and it is difficult to study their properties separately. So in order to make their study easy classification of elements is done.

Classification: It is the grouping of similar elements together and separating them from the elements which are not similar to them.

  • Many attempts have been made by many scientists in order to classify elements
  • When the elements were discovered so many patterns were proposed (approx. 2000 patterns )
  • Initially 31 elements were introduced than the discovery went to 63 then to 114 and now more than it.
  • It is very difficult to memorize properties of so many elements therefore some patterns were proposed to make their study easier.


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