- In a radioactive decay, one element changes into another in a process called transmutation.
- The mass of the daughter particles are less than that of the parent particle. This difference in mass is called mass defect or mass loss.
- Mass defect is the missing mass in a nuclear reaction and the missing mass will turn into thermal energy and kinetic energy of the product particles.
- The mass lost is converted into energy.
- Einstein’s formula can be used to calculate the amount of nuclear energy released from the defect of the mass in radioactive decay or nuclear reaction.Einstein Formula
E = mc2wherem = mass change, in kgc = speed of light, in m s-1E = energy changed, in J