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Mn and Mp represent mass of neutron and ...

`M_n` and `M_p` 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 :

A

`M=[NM_n + ZM_p]`

B

`M=N[M_n + M_p]`

C

`M lt [NM_n + ZM_p]`

D

`M gt [NM_n + ZM_p]`

Text Solution

Verified by Experts

The correct Answer is:
C
Mass of N neutrons `=NM_n`
Mass of Z protons `=ZM_p`
`therefore` Actual mass of the nucleus is always less than the sum of the masses of the constituent protons and neutrons .
Thus `M lt [NM_n + ZM_p].`
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