Student Worksheet: Modeling Nuclear Changes Initial Final Element(s) and Particles (if applicable) Number of Protons Number of Neutrons Total Mass of Reactants Element(s) and Particles (if applicable) Number of Protons Number of Neutrons Total Mass of Products Alpha decay Polonium Lead α particle Beta-plus decay Sodium Neon Positron Betaminus decay Sodium Magnesium β particle Gamma radiation Cobalt Nickel γ radiation β particle Fission Uranium Barium Krypton Neutron Neutrons Fusion Deuterium Helium Tritium Neutron