Periodic Table

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Across
  1. 3. the heaviest element found on the Periodic Table
  2. 4. smallest particle of an element that retains the elements properties
  3. 6. rows (going across) on the Periodic Table
  4. 8. columns (going up and down) on the Periodic Table
  5. 9. number of man made elements
  6. 13. the total number of elements found on the Periodic Table
  7. 16. number of elements found in nature
  8. 19. particles with a negative charge of one that occupies the space around the nucleus
Down
  1. 1. particles in the nucleus with a positive charge of 1
  2. 2. atoms of the same element that have a different number of neutrons
  3. 5. the number of protons an atom has
  4. 7. the number of protons plus the number of neutrons
  5. 10. particle in the nucleus that is electrically neutral
  6. 11. an atom with a charge
  7. 12. left side of the stair step line (except hydrogen)
  8. 14. the correct chemical formula for salt
  9. 15. right side of stair step line (+ hydrogen)
  10. 16. positively charged center of the atom
  11. 17. bond between nonmetals
  12. 18. bond between a metal and nonmetal