MCQ
Which group of elements could be placed in Mendeleev's Periodic Table without disturbing the original order?
  • A
    Alkali metals
  • B
    Alkaline earth metals
  • C
    Non $-$ metals
  • Noble gases

Answer

Correct option: D.
Noble gases
According to Mendeleevs classification, the properties of elements are the periodic function of their atomic masses and there is a periodic recurrence of elements with similar physical and chemical properties.
Noble gas being inert, could be placed in a separate group without disturbing the original order.

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