Question

$M_p$ denotes the mass of a proton and $M_n$ that of a neutron. A given nucleus, of binding energy contains $Z$ protons and $N$ neutrons. The mass $M (N, Z)$ of the nucleus is given by (where c is the velocity of light)

• A. $M(N, Z)=N M_{n}+Z M_{p}-B c^{2}$
• B. $M(N, Z)=N M_{n}+Z M_{p}+B c^{2}$
• C. $M(N, Z)=N M_{n}+Z M_{p}-B / c^{2}$
• D. $M(N, Z)=N M_{n}+Z M_{p}+B / c^{2}$

Answer 1

Answer: (C)

Binding energy $=\left[N M_{m}+Z M_{P}-M(N, Z)\right] c^{2}$