Identify the correct expression for the mass defect of a nucleus having protons

PHYSICS · Single correct · A Level · Physics · Nuclear physics · Nuclear physics

Problem

Identify the correct expression for the mass defect ΔM\Delta M of a nucleus having ZZ protons, (A−Z)(A-Z) neutrons and measured nuclear mass MM. (a) ΔM=[Z mp+(A−Z) mn+Z me]−M\Delta M = [Z\,m_p + (A-Z)\,m_n + Z\,m_e] - M (b) ΔM=[Z mp+(A−Z) mn]−M\Delta M = [Z\,m_p + (A-Z)\,m_n] - M (c) ΔM=M−[Z mp+(A−Z) mn]\Delta M = M - [Z\,m_p + (A-Z)\,m_n] (d) ΔM=[Z mn+(A−Z) mp]−M\Delta M = [Z\,m_n + (A-Z)\,m_p] - M

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