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  • How did Mendeleev arrange the elements? He left empty places in his periodic table Why? Explain the limitations of Mendeleev classification.​

How did Mendeleev arrange the elements? He left empty places in his periodic table Why? Explain the limitations of Mendeleev classification.​

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He arranged the elements in the increasing order of their atomic masses.

He left empty places in his periodic table for undiscovered elements.

Limitations

  • Position of Hydrogen: Position of hydrogen in the periodic table is uncertain Because hydrogen is placed in 1 A group with Alkali metals.
  • Position of isotopes: isotopes haven't been given a separate place in the periodic table.
  • Cause of periodicity: Mendeleev could not explain the cause of periodicity. 
  • Separation of similar elements: some dissimilar elements have been placed together.
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Ankit Dutt

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