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Which one is not the fault of Mendeleev’s periodic table.

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Which one is not the fault of Mendeleev's periodic table.

  1. Position of hydrogen is not fixed.
  2. Position of isotope is not fixed.
  3. Position of Lanthanides and actinides are not found.
  4. Position of sodium is not fixed.

1 Answer


The correct answer is option D (Position of sodium is not fixed).

D is the correct answer because in Mendeleev's periodic table, the position of sodium was fixed.

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