Classification Of Elements In Modern Periodic Table

All existing matter in our surroundings are made up of basic units known as elements. Initially in 1800, only 31 chemical elements were discovered. After some advancement in technology in 1865 about 63 more elements were discovered. At present there are 114 elements known to us. Out of 114 chemical elements some of the elements are man-made.

Classification of Elements

When there were only 31 elements it was relatively easy to study the properties of these chemical elements individually. Now the number of elements has raised to 114, it would be very cumbersome to study the properties of every element individual. In order to ease the work, scientists started thinking about a method so that the study of elements can be simplified. They decided to organize the elements in a periodic table according to the information available about the elements and various characteristics shown by them.

It was observed that elements show periodicity in their properties. Many tables were made to arrange the elements in a ordered manner based on their characteristics to study the properties of elements in a fixed pattern.

Today we study the elements with the help of the modern periodic table. Periodic classification of elements is the method by which elements are grouped on the basis of their characteristics i.e. we keep the elements which are alike in one group and the rest of the elements in the other group. Some empty spaces have been left in the periodic table so that the elements that will be discovered in future can be placed without disturbing the trending periodicity of the elements.

Significance of classification of elements

  1. Makes the study of elements easy: Classification of elements in groups provide us a fixed pattern in which the elements change their properties periodically. Periodic table made the study of physical and chemical properties of elements simple and organized. We can now just go to the group and see the properties of the elements of periodic table or predict the properties of an element if we know the characteristics of other elements present in the same group.
  2. Helps in discovering new elements: Although there are so many elements which are already discovered, there are chances that new elements can be discovered. Scientists can take the help of periodic table and know the trending characteristics based on the properties of elements and hence can identify the new elements with the existing ones. Besides, researchers are continuously striving to discover new elements and explore their properties.

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Practise This Question

Which of the following can form Dobereiner's Triads with Li(A = 6.9) and sodium (A = 23)?