Question

What are the defect of mendeleevs periodic table

Answer 1

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Answer 2

Hey !!

  DEFECTS OF MENDELEEV'S PERIODIC TABLE

• Position of hydrogen in the periodic table was not correctly defined.
• In certain pair of elements the increasing order of atomic masses was not obeyed. Isotopes have not been given separate places in the periodic table.
• Some similar elements were separated and dissimilar elements were grouped together.
• Mendeleev could not explain the cause of periodicity among the elements.

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