The half life of an old rock element is 5800 years. In how many years its sample of 25 gm is reduced to 6.25 gm . The half life of an old rock element is 5800 years. In how many years its sample of 25 gm is reduced to 6.25 gm . June 7, 2021 Category: Chapter 13 - Nuclei , MTG NEET Physics , Part 2 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related