The half – life of 131 I is 8 days. Given a sample of 131 I at time t = 0, we can assert that The half - life of 131 I is 8 days. Given a sample of 131 I at time t = 0 we can assert that September 14, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related