Periodic Table

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Across
  1. 2. Creator of the table.
  2. 5. The smallest particle of an element that retains the element properties.
  3. 6. Element that goes by Ds.
  4. 7. Number Sum of the protons and neutrons.
  5. 9. An atom with a charge.
  6. 10. Number of man made elements.
  7. 12. Right of stair step line.
  8. 15. Most rare element.
  9. 16. Atoms of the same element that have different numbers or neutrons.
  10. 18. Special element because it is on the left side of the stair step line.
  11. 19. Common model used to represent an atom.
Down
  1. 1. The columns that share chemical properties.
  2. 3. Only metal liquid at room temperature.
  3. 4. What does the element K stand for?
  4. 7. Along stair step line.
  5. 8. How many families are on the periodic table?
  6. 11. Number number of protons an atom has.
  7. 13. Heaviest element.
  8. 14. What does NaCl stand for?
  9. 17. The rows in the periodic table.