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KCET2007PhysicsNuclear Physics

A radioactive substance contains 10000 nuclei and its half-life period is 20 days. The number of nuclei present at the end of 10 days is

Options

  1. A7070
  2. B9000
  3. C8000
  4. D7500

Correct answer

A. 7070

Step-by-step solution

We know, N N₀ = ( 1 2 )^ t / T N 10000 = ( 1 2 )^ 10 / 20 N= 10000 2 = 10000 1.414 =7070

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