Assume that a neutron breaks into a proton and an electron . The energy reased during this process is (mass of neutron `= 1.6725 xx 10^(-27) kg` mass of proton `= 1.6725 xx 10^(-27) kg` mass of electron `= 9 xx 10^(-31) kg )`

Options

A. `5.4 MeV`
B. `0.73 MeV`
C. `7.10 MeV`
D. `6.30 MeV`

Answer

B

Explanation

Released energy
`=(1.6747xx10^(-27)-1.6725xx10^(-27)-9xx10^(-31))xx (3xx10^(8))^(2)J=0.73 MeV`