JEE Main & Advanced
Physics
Atomic Physics
Question Bank
Numerical Value Type Questions - Nuclei
question_answer
The activity of a freshly prepared radioactive sample is \[{{10}^{10}}\] disintegrations per second, whose mean life is \[{{10}^{9}}\] s. The mass of an atom of this radioisotope is \[{{10}^{-25}}kg.\] The mass (in mg) of the radioactive sample is