Polonium has a half-life of 140 days. If we take 20 g of polonium initially then the amount of it that remains after 280 days is Polonium has a half-life of 140 days. If we take 20 g of polonium initially then the amount of it that remains after 280 days is June 7, 2021 Category: Chapter 13 - Nuclei , MTG NEET Physics , Part 2 , Facebook Messenger WhatsApp Share this:TwitterFacebook Related