Put values in formula (1) to find the mass defect.
Δm = {2(1.6726 × 10-27) + 2(1.6749 × 10-27)} – 6.6447 × 10-27
Δm = (3.3452 + 3.3498) ×10-27 – 6.6447 × 10-27 = 0.0503 × 10-27 kg …… (3)
Now 1.660 × 10-27 kg = 1 amu
OR 1 kg = (1/1.660) × 1027 amu = 0.602409 × 1027 amu
Multiply by the value of Δm from equation (3) on both sides.
0.0503 × 10-27 kg = 0.0503 × 0.602409 amu = 0.0303 amu
Since 1 amu = 931.5 MeV, therefore,
0.0303 amu = .0303 × 931.5 = 28.224 MeV
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