4 The mean lives of a radioactive substance are 1620 year

Last updated: 7/4/2023

4 The mean lives of a radioactive substance are 1620 year and 405 year for alpha emission and beta emission respectively what the time during which th of a sample will decay if it is decaying both by alpha emission and beta emission simultaneously W A 470 45 year B 449 24 year C 269 57 year D 345 56 year O A B O C D