Define B.E. and write its expression.

Explanation

The energy equivalent to mass defect is the binding energy of nucleus
Binding Energy, B.E. = `Deltamc^2`
`Deltam =[{m_pz + m_n (A - Z)} -M]`
` B.E. = Deltam C `
`B.E. = [{m_pz+m_n (A - Z)}-M]c^2`
When mass deflect `(Deltam)` is expressed in a.m.u., then binding energy is written as
`B.E. = [{m_pz + m_n(A - Z)} -M] a.m.u.`
Since `1 a.m.u. =931 MeV `
`B.E. = [{m_pz + m_n (A - Z)} - M] 931 MeV `
`B.E. = Deltam xx 931 MeV`