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If the mass defect of 5 B 11 is 0.081 u , its average binding energy (in MeV ) is

Options

  1. A8.60 MeV
  2. B6.85 MeV
  3. C6.60 MeV
  4. D5.86 MeV

Correct answer

B. 6.85 MeV

Step-by-step solution

Given, Δ m for 5 B 1 1 = 0.0821 u Number of nucleons = 11 ​Binding energy = ( 931 × Δ m ) MeV = 9 3 1 × 0.081 = 75.411 MeV Average binding energy = Binding energy Number of nucleons = 75.411 11 = 6.85 MeV

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