Periodic Table Crossword Puzzle

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Across
  1. 1. metals
  2. 3. metals
  3. 6. configuration
  4. 8. law
  5. 9. Mendeleev
  6. 10. Gases
Down
  1. 2. earth metals
  2. 4. predictions
  3. 5. Number
  4. 7. trends