3 6 32 mm 4 5 8 mm 7 Half life of a radioactive substance is

Last updated: 6/13/2023

3 6 32 mm 4 5 8 mm 7 Half life of a radioactive substance is 20 min The time taken between 20 decay and 80 decay wil be min 1 20 3 30 min 2 40 min 4 25 min Met