The mass of proton is 1.0073 u and that of neutron is 1.0087 u (u=atomic mass unit). The binding energy of .2He4 is (mass of helium nucleus =4.0015u) The mass of proton is 1.0073 u and that of neutron is 1.0087 u (u=atomic mass unit). The binding energy of .2He4 is (mass of helium nucleus =4.0015u) August 16, 2020 Category: Chapter 31 - Nuclei , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics , Facebook Messenger WhatsApp Share this:TwitterFacebook Related