Question:

Assume that a neutron breaks into a proton and an electron. The energy released during this process is (Mass of neutron = 1.6725×10⁻²⁷kg, Mass of proton = 1.6725×10⁻²⁷kg, Mass of electron = 9×10⁻³¹kg)

6.30MeV

5.40MeV

0.50625MeV

7.10MeV

n→p+e
Δm=(mp+me)−mn
Δm=9×10⁻³¹kg
Energy released=9×10⁻³¹×(3×10⁸)²J
=9×10⁻³¹×(3×10⁸)²/1.6×10⁻¹³=0.50625 MeV