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Nuclei — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsNuclei1 Mark
Question
The two alpha particles are released along with energy, when Li-7 is bombarded with a proton. It was found that the mass of the two alpha particles weighs less that the original product in the reaction. Now the mass that was converted to energy is called as:
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Answer

  1. Mass defect
Explanation:
The two alpha particles are released along with energy when Li−7 is bombarded with a proton. It was found that the mass of the two alpha particles weighs less that the original product in the reaction. Now, the mass that was converted to energy is called as Mass defect.
The difference between the expected mass and the actual mass of an isotope is called mass defect.
The expected mass is calculated by adding the masses of protons, neutrons and electrons present.

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