A uranium nucleus U-238 of atomic number 92 emits two alpha particles and two beta particles and transforms into a thorium nucleus. What is the mass number and atomic number A uranium nucleus U-238 of atomic number 92 emits two alpha particles and two beta particles and transforms into a thorium nucleus. What is the mass number and atomic number October 17, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related