1.

If m, mn and mp are the masses of \[_{Z}{{X}^{A}}\]nucleus, neutron and proton respectively                      [KCET 2003; CPMT 2003]

A.            \[m<{{(A-Z)}_{{{m}_{n}}}}+Z{{m}_{p}}\]                     
B.            \[m=(A-Z){{m}_{n}}+Z{{m}_{p}}\]
C.            \[m=(A-Z){{m}_{p}}+Z{{m}_{n}}\]                                  
D.            \[m>(A-Z){{m}_{n}}+Z{{m}_{p}}\]
Answer» B.            \[m=(A-Z){{m}_{n}}+Z{{m}_{p}}\]


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