The half-life of 60Co is approximately 5.25 years. In a sample containing 1 g of freshly prepared 60Co, how much of the isotope will be left after 21 years? how much of the isotope will be left after 21 years? The half-life of 60Co is approximately 5.25 years. In a sample containing 1 g of freshly prepared 60Co June 7, 2021 Category: Chapter 13 - Nuclei , MTG NEET Physics , Part 2 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related