The half-life of radon is 3.8 days. After how many days will only one-twentieth of radon sample be left over ? The half-life of radon is 3.8 days. After how many days will only one-twentieth of radon sample be left over ? October 17, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related