Radiation

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Across
  1. 5. A fast-moving electron released from a nucleus
  2. 7. A negatively charged particle that orbits the nucleus
  3. 8. The central part of an atom containing protons and neutrons
  4. 11. Energy or particles given out by unstable atoms
  5. 13. A positively charged particle found in the nucleus
Down
  1. 1. An atom with the same number of protons but a different number of neutrons
  2. 2. Describes a nucleus that does not give out radiation
  3. 3. A particle in the nucleus with no electrical charge
  4. 4. A wave of energy with no mass or charge
  5. 6. The process where unstable atoms release radiation
  6. 9. A property that can be positive, negative or neutral
  7. 10. A type of radiation made of 2 protons and 2 neutrons
  8. 12. The ability to knock electrons off atoms