Question

A copper coin has mass of 63g. Calculate nuclear binding energy. The coin is entirely made of Cu^63 atoms Mass of Cu^63 atom=62.92960

Answer 1

Answer:Number of atoms in a 3g coin=  

63

6.023×10  

23

×3

​  

=2.868×10  

22

 

Each copper atom has 29 protons and and 34 neutrons.

Thus, the mass defect of each atom is 29×1.00783+34×1.00867−62.92960=0.59225 u.

Total mass defect of all atoms = 0.59225 u×2.868×10  

22

=1.6985×10  

22 u.

Thus, the nuclear energy required=1.6985×10  

22

×931 MeV=1.58×10  

25  MeV.