9.2.5 Nuclear Chemistry Key Words

123456789101112
Across
  1. 1. A type of radiation made up of the nucleus of a helium atom
  2. 3. The time taken for half of a number of radioisotopes to decay
  3. 4. Part of an atom, found in the nucleus, has a positive charge
  4. 7. This is the main way of detecting ionisation radiation
  5. 9. This has the same mass as an electron but has a positive charge
  6. 10. When atoms have the same number of protons, but different numbers of electrons, they are called this
  7. 12. A radioactive isotope is called this for short
Down
  1. 1. The type of radiation emitted with the lowest penetration power
  2. 2. This is the main way of detecting non-ionising radiation
  3. 5. A type of radiation made up of fast moving electrons
  4. 6. I have no charge and reside in the nucleus of an atom
  5. 7. The type of radiation emitted with the highest penetration power
  6. 8. This word describes unstable elements that lose particles to try to become stable
  7. 11. This word describes different types of the same atom which have the same number of protons, but different numbers of neutrons