It is the classification of elements to position them in the periodic table based on their atomic number

The\xa0periodic\xa0table, also known as the\xa0periodic\xa0table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties. The columns, called groups, contain elements with similar chemical behaviours.

The classification of elements on the basis of their chemical properties, atomic no and physical properties