History of the atom and the periodic table

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Across
  1. 4. Russian Scientist who created the first periodic table
  2. 6. man who published the law of octaves
  3. 9. man who thought that an atom was spherical with only electrons in
  4. 11. man who put the periodic table by proton number rather than relative atomic mass
  5. 12. man who discovered the electron
Down
  1. 1. man who first noticed that elements had physical properties
  2. 2. man who discovered the proton
  3. 3. the subject involving the periodic table
  4. 5. the basis that determines where in the periodic table elements are
  5. 7. pure substance made up of one type of atom
  6. 8. the man who discovered the proton also discovered this
  7. 10. the particles inside everything