History of the Atom and Periodic Table

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Across
  1. 5. Discovered that elements were defined by the number of protons
  2. 6. Discovered in 1897 by Thomson
  3. 9. Grouped close elements with similar properties in 3s
  4. 10. Discovered the first sub-atomic particle to be found
  5. 11. Was Discovered By Rutherford in 1902
Down
  1. 1. Pioneered Modern Atomic Theory
  2. 2. Discovered the second sub-atomic particle to be found
  3. 3. Used to classify Atoms in Mendeleev's Periodic Table
  4. 4. Was Discovered By James Chadwick in 1932 (particle)
  5. 7. Examples of these:Proton, Neutron and Electron
  6. 8. Was the Forename of the founder of the Modern Periodic Table