Periodic Table Fun

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Across
  1. 5. the theme of the crossword/chart of all known elements
  2. 6. how reflective something is
  3. 8. The number above the element symbol
  4. 10. creator of the periodic table
Down
  1. 1. groups 3-12 on the table
  2. 2. something that is easy to break
  3. 3. group 17 of the table, highly reactive
  4. 4. technique to model an atom that show electrons around the nucleus in rings
  5. 7. not shiney, bad conductors, and brittle
  6. 9. chemically unreactive, wont react with any other chemical