6 67x 10 53 A radioactive material has mean lives of 1620 yr

Last updated: 6/8/2023

6 67x 10 53 A radioactive material has mean lives of 1620 yr and 520 yr for a and emission respectively The material decays by simultaneous a and emission The time in which 1 4th of the material remains intact is a 4675 yr b 720 yr d 324 yr c 545 yr constant