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MHT CET2007ChemistryChemical Kinetics

A certain nuclide has a half-life period of 30 min. If a sample containing 600 atoms is allowed to decay for 90 min, how many atoms will remain ?

Options

  1. A200 atoms
  2. B450 atoms
  3. C75 atoms
  4. D150 atoms

Correct answer

C. 75 atoms

Step-by-step solution

aligned n &= total time half- life period = 90 30 =3 N &=N₀ ( 1 2 )^ n &=600 ( 1 2 )³ &= 600 8 &=75 atoms aligned

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