Half-life period of a radioactive substance is 6h. After 24h activity is 0.01μC, what was the initial activity ? Half-life period of a radioactive substance is 6h. After 24h activity is 0.01μC what was the initial activity ? August 16, 2020 Category: Chapter 31 - Nuclei , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics , Facebook Messenger WhatsApp Share this:TwitterFacebook Related