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Nuclei — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsNuclei2 Marks
Question
Define-
(i). Radio Activity$\quad$$\quad$(ii). Mass defect
✓

Answer

(i) Radio Activity: Spontaneous emission of alpha, beta, or gamma radiations from unstable nuclei to achieve stability.
(ii) Mass Defect: The difference between the sum of masses of individual nucleons and the actual rest mass of the nucleus.

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