Atomic Theory

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Across
  1. 1. This number shows the number of electrons in an atom
  2. 5. The man who created the Gold Foil experiment and theorised that all of an atom's positive charge is concentrated in its nucleus
  3. 6. Electrons change this level as they gain or lose energies
  4. 7. James Chadwick designed an experiment to show that these exist
  5. 8. The most stable electron configuration
  6. 10. The negatively charged particle in an atom
  7. 13. This is the region of space around the nucleus where an electon is likley to be found
  8. 14. The positively charged particle in the nucleus
Down
  1. 2. This exists because an atom can have different number of neutrons
  2. 3. This man's experiments focussed on electrons and their positions
  3. 4. This shows the most likley locations for electrons in an atom
  4. 9. This man's experiments provided the first evidence that atoms are made of smaller particles
  5. 11. This relationship between elements in compounds is always the same
  6. 12. Name of the person who proposed that all elements are composed of atoms