Periodic Table

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Across
  1. 3. rows
  2. 5. This mann arranged elements in order of atomic weights
  3. 7. inert
  4. 10. Group 1 metals
  5. 11. Group 7
Down
  1. 1. columns
  2. 2. godfather of the periodic table
  3. 4. The number of protons plus neutrons gives this
  4. 6. Metals in the middle
  5. 8. shells holds electrons
  6. 9. This man suggested 'Law of Octaves'