Calculate binding energy per nucleon of deuteron whose mass is 2.013554 a.m.u. Take mass of proton and neutron as 1.007825 a.m.u. and 1.008665 a.m.u. respectively and 1 a.m.u. `=931` M eV.

Explanation

To calculate the binding energy per nucleon of deuteron, we will follow these steps:

### Step 1: Understand the concept of mass defect
The mass defect is the difference between the mass of the individual nucleons (proton and neutron) and the actual mass of the nucleus. It is a measure of the energy that is released when the nucleons bind together to form the nucleus.

### Step 2: Write the formula for mass defect
The formula for mass defect (Δm) can be expressed as:
\[
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