tell the properties of periodic table table

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Please find below the solution for your asked query:

Properties of the Modern Periodic table: 

•  The "atomic number" has been taken as the basis of classification which is a more fundamental property of elements.
• Since the classification is based on atomic number, so isotopes (having same atomic no.) are placed at one place which is justified.
• The periodicity in the physical and chemical properties of elements is defined by electronic configuration which explains the nature and behavior of the elements.
• The problem of anomalous pair of elements (as Ar and K) in Mendeleev's table, is removed as now according to atomic no. Ar(18) is kept before  (19).
• The Lanthanides and Actinides of different behavior than d-block elements are placed in different f-block elements at the bottom of the table.
• The table gives a simple and clear view of the properties of elements as the elements have clear electronic configurations.