Assertion : Radioactive heavy nuclie decay by a series of alpha – and / or bita – emission , to form a stable isotope of lead. Reason : Radioactivity is a physical phenomenon. Assertion : Radioactive heavy nuclie decay by a series of alpha - and / or bita - emission to form a stable isotope of lead. Reason : Radioactivity is a physical phenomenon. February 14, 2021 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related