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Questions  

If m, mn and mp are the masses of zXA nucleus, neutron and proton respectively

a
m<(A−Z)mn+Zmp
b
m=(A−Z)mn+Zmp
c
m=(A−Z)np+Zmn
d
m>(A−Z)mn+Zmp

detailed solution

Correct option is A

The mass of nucleus formed is always less than the sum of the masses of the constituent protons and neutrons  i.e. m<(A−Z)mn+zmp

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Mn and Mp represent mass of neutron and proton respectively. If an element having atomic mass M has N-neutron and Z-proton, then the correct relation will be 


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