the-half-life-for-the-radioactive-decay-of-u-238-is-45-billion-years-and-is-inde

Question

The half-life for the radioactive decay of U-238 is 4.5 billion years and is independent of initial concentration. How long will it take for 18% of the U-238 atoms in a sample of U-238 to decay?

Accepted Answer

1.3 billion years

Answer

29 billion years

Answer

58 billion years

Answer

3.2 billion years