G10 PHYSICS

Cards (27)

  • Mass defect is the difference between the expected mass and the actual mass of an atom or nucleus.
  • Binding energy is the energy required to break up an atom or nucleus into its constituent parts.
  • The nucleus is composed of protons and neutrons, with the actual mass being less than the sum of the separate particles.
  • The binding energy of Helium is E = Δmc2, where Δm is the mass difference between the atomic mass and the sum of the atomic mass and the atomic number, and c2 is the speed of light squared.
  • The binding energy of 238U indicates the total energy involved in holding the nucleus together.
  • The stability of the nucleus is determined by the binding energy per nuclear particle.
  • The nuclei with the greatest binding energy per nucleon are the most stable.
  • The "missing" mass in the nucleus is in the form of energy holding the nucleus together.
  • To determine the mass defect, distinguish the number of protons and neutrons of the element or radioisotopes.
  • The proton number is equal to the atomic number while the neutron number is the difference of mass number and atomic number.
  • Multiply the number of protons to the mass of proton which is 1.00727647 amu.
  • Multiply the neutron number to the mass of neutron which is 1.00866440 amu.
  • Add the mass of protons and mass of neutrons to get the expected mass.
  • To determine the binding energy, multiply the mass defect (Δm) and the c2 which is 931.5 MeV/amu.
  • E = Δmc2 is the binding energy, measured in MeV/amu.
  • Mass defect, measured in amu, is represented as Δm = m_e - m_a.
  • Expected mass, measured in amu, is represented as m_e = Δm + m_a.
  • Actual mass, measured in amu, is represented as m_a = Δm - m_e.
  • Mass defect, Δm, is calculated as m_e - m_a.
  • The nucleus is composed of protons and neutrons.
  • Actual mass is less than the mass of separate particles.
  • Mass defect indicates the total energy involved in holding the nucleus together.
  • Alpha particle is represented as helium nucleus.
  • Beta particle is represented as electron.
  • Gamma ray is represented as high-energy proton.
  • Half-life is the amount of time it takes one half of a sample or rad to decay.
  • Atoms decay.