The half-life of Argon is 6.5 x 10^3 seconds. A sample

Last updated: 8/7/2022

The half-life of Argon is 6.5 x 10^3 seconds. A sample contains 4.2 x 10¹7 nuclei. What is the decay constant for this decay? 1.07 x 10-4 s-1 2.25 x 10-4 s-1 1.55 x 10-4 s-1 7.63 x 10-4 S-1