Cards (3)

  • Positrons are positive electrons, anti-matter (0 e or β+)
    (+1 )
  • When matter and anti-matter collide, they annihilate each other leaving only 2 gamma rays exactly opposite (180 degrees) that travel forever or until a collision.
  • During positron emission, the nucleus has too few neutrons so a proton turns into a neutron and emits a fast-moving positron.