an elect a of the ord s a pho 15 In a mean life of a

Last updated: 6/21/2023

an elect a of the ord s a pho 15 In a mean life of a radioactive sample 1 About 1 3 of substance disintegrates 2 About 2 3 of the substance disintegrates 3 About 90 of the substance disintegrates 4 Almost all the substance disintegrates