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89 A c 231 after emission of some α and β - particles gives 82 P b 207 . The number of such α and β - particles are respectively

Options

  1. A5,7
  2. B6,5
  3. C7,5
  4. D5,6

Correct answer

B. 6,5

Step-by-step solution

Number of α - particles = 231 - 207 4 = 6 Number of β − = 12 − 89 − 2 = 5 .

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