The half-life of Barium-139 is 4.96 x 103 seconds. A sample

Last updated: 8/7/2022

The half-life of Barium-139 is 4.96 x 103 seconds. A sample contains 3.21 x 10¹7 nuclei. What is the decay constant for this decay? 2.22 x 10-4 s-1 1.40 x 10-4 s-1 1.67 x 10-4 S-1 5.43 x 10-4 s-1