Q.

Calculate the binding energy of an alpha particle (in MeV) (approx.) from the following data:-

mass of H atom = 1.007862 u

mass of neutron = 1.008656 u

mass of He atom = 4.00206 u

Take 1 u = 931 MeV/c2.

1 25  
2 40  
3 29  
4 19  

Ans.

(3)

Eb=(2mH+2mn-mα)c2=28.8 MeV=29 MeV