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9 April, 15:27

An atom of 135I has a mass of 134.910023 amu. Calculate the binding energy in MeV per atom. Enter your answer with 4 significant figures and no units. Use the masses:

mass of 1H atom = 1.007825 amu

mass of a neutron = 1.008665 amu

1 amu = 931.5 Me

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  1. 9 April, 15:38
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    1132 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 I = 5

    3

    Thus, the number of protons = 53

    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

    135 = 53 + Number of neutrons

    Number of neutrons = 82

    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 = (53*1.007825 + 82*1.008665) amu = 136.125255 amu

    Mass defect = Δm = |136.125255 - 134.910023| amu = 1.215232 amu

    The conversion of amu to MeV is shown below as:-

    1 amu = 931.5 MeV

    So, Energy = 1.215232*931.5 MeV/atom = 1132 MeV/atom
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