Answer:
1.06×10³ MeV/atom
Explanation:
Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.
Also, atomic number of Sn = 5
0
Thus, the number of protons = 50
Mass number is the number of the entities present in the nucleus which is the equal to the sum of the number of protons and electrons.
Mass number = Number of protons + Number of neutrons
125 = 50 + Number of neutrons
Number of neutrons = 75
Mass of neutron = 1.008665 amu
Mass of proton = 1.007825 amu
Calculated mass = Number of protons*Mass of proton + Number of neutrons*Mass of neutron
Thus,
Calculated mass = (50*1.007825 + 75*1.008665) amu = 126.041125 amu
Given mass = 124.907785 amu
<u>Mass defect = Δm = |126.041125 - 124.907785| amu = 1.13334 amu
</u>
The conversion of amu to MeV is shown below as:-
1 amu = 931.5 MeV
<u>So, Energy = 1.13334*931.5 MeV/atom = 1.06×10³ MeV/atom</u>
