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Mister prabin

Mention any defects or anomalies in Mendeleev's periodic table.

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Mister prabin

Any 4 defects in Mendeleev's periodic table are:

  1. Inert gas or noble gases were absent.
  2. It couldn't arrange lanthanides and actinides.
  3. Its eight groups weren't divided into sub-group.
  4. It couldn't arrange isotopes.