28 The mean lives of a radioactive substances are 2000 years

Last updated: 6/25/2023

28 The mean lives of a radioactive substances are 2000 years and 400 years for a and emission respectively What will be the time in years after which 5 6th of the given sample will decay if it is decaying by both a and B emission together In 6 1 79 1 297 2 397 3 597