Mass Defect and Binding Energy Presented by: Reyna Mae L. De la Cruz
Mass defect is the difference between the actual atomic mass and the predicted mass calculated by adding the mass of protons and neutrons present in the nucleus. Mass Defect
Binding Energy Nuclear binding energy is the energy required to split an atomic nucleus into its components. It is the energy equivalent to the mass defect Binding energy can be calculated by Einstein’s formula, E = mc2
𝚫M = ( Zmp + Nmn ) – MA Mass Defect Formula Where: 𝚫M – mass defect MA – mass of the nucleus mp – mass of a proton, i.e. 1.00728 amu mn – mass of a neutron, i.e. 1.00867 amu Z – number of protons N – number of neutrons
For example, the binding energy of carbon-12 (nuclide mass = 12.0000 u, where u is equal to 1.66x10 -27 kg) nucleus, given that the atomic number of carbon is 6. Proton 1.672623 x10 -27 Neutron 1.674929 x 10 -27 Electron 9.109390 x10-31 1 u 1.6605 x 10-27 kg
4 2 H is the most abundant isotope of helium. Its mass is 6.6447x 10-27kg. What is its mass defect ? Formula: E=mc2 𝚫 M = ( Zmp + Nmn ) – MA