GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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mass
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effective mass
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mass defect
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mass of proton
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Detailed explanation-1: -This missing mass is known as the ‘mass defect’ and it accounts for the energy released. The mass defect (M) can be calculated by subtracting the original atomic mass (MA) from the sum of the mass of protons (mp= 1.00728 amu) and neutrons (mn= 1.00867 amu) present in the nucleus.
Detailed explanation-2: -The difference between the sum of the masses of the components and the measured atomic mass is called the mass defect of the nucleus. Just as a molecule is more stable than its isolated atoms, a nucleus is more stable (lower in energy) than its isolated components.
Detailed explanation-3: -The difference in mass can be calculated by the Einstein equation, E = mc2, where E is the nuclear binding energy, c is the speed of light, and m is the difference in mass. This ‘missing mass’ is known as the mass defect, and represents the energy that was released when the nucleus was formed.