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Sahay Sir > Question Answers > Cengage JEE Mains Physics by B.M Sharma > Chapter 30 - Nuclear Physics > A sample of a radioactive element has a mass of 10 g at an instant t=0. The approximate mass of this element in the sample after two mean lives is .

A sample of a radioactive element has a mass of 10 g at an instant t=0. The approximate mass of this element in the sample after two mean lives is .

A sample of a radioactive element has a mass of 10 g at an instant t=0. The approximate mass of this element in the sample after two mean lives is .