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Question

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


A

M<[NMn+ZMp]

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B

M>[NMn+ZMp]

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C

M=[NMn+ZMp]

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D

M=N[Mn+Mp]

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Solution

The correct option is A

M<[NMn+ZMp]


Actual mass of the nucleus is always less than total mass of nucleons. So, M<[NMn+ZMp]

The difference in mass is called mass defect.


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