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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > Assertion : Actinium series is so called because it starts with an isotope of actinium. Reason : Actinium is formed in the nature as such and is not formed from the disintegration of any other radioisotope.

Assertion : Actinium series is so called because it starts with an isotope of actinium. Reason : Actinium is formed in the nature as such and is not formed from the disintegration of any other radioisotope.

Calculate mass defect in the following reaction 1 H^2 + 1H^3 gives 2He^4 + 0n^1