Calculate binding energy per n ucleon of `""_(83)Bi^(209)`. Given mass of `""_(83)Bi^(209)=208.980388` a.m.u, mass of neutron `=1.008665` a.m.u. and mass of proton `=1.007825` a.m.u. Take 1 a.m.u. `=931` M eV.

Explanation

To calculate the binding energy per nucleon of the bismuth isotope \( _{83}^{209}\text{Bi} \), we will follow these steps:

### Step 1: Determine the number of neutrons
The number of neutrons in the bismuth isotope can be calculated using the formula:
\[ \text{Number of neutrons} = \text{Mass number} - \text{Atomic number} \]
For \( _{83}^{209}\text{Bi} \):
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