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Group displacement law was given by

  • A.Becquerel
  • B.Rutherford
  • C.Mendeleev
  • D.Soddy and Fajans

Answer: D

The group displacement law was given by Soddy and Fajans.

It states that alpha emission moves an element two groups to the left in the periodic table, while beta emission moves it one group to the right. That follows from the change in atomic number: \(-2\) for alpha, \(+1\) for beta.

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