Nuclear Radiation

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Across
  1. 3. Negatively charged particle orbiting the nucleus of an atom
  2. 6. Type of radiation that consists of 2 protons and 2 neutrons
Down
  1. 1. A particle representing a quantum of light or other electromagnetic radiation
  2. 2. Type of radiation consisting of high-speed electrons
  3. 4. Central part of an atom, contains protons and neutrons
  4. 5. Type of radiation with no mass and high penetration power