The half-life o f 131I is 8 days. Given a sample of 131I at time t=0, we can assert that The half-life o f 131I is 8 days. Given a sample of 131I at time t=0 we can assert that September 15, 2021 Category: Chapter 18 - Atoms and Nuclei , JEE Mains Physics 2002-2019 [...]