Periodic Table Crossword Puzzle

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Across
  1. 1. Group 14
  2. 4. another term for group
  3. 5. another term for metalloids
  4. 6. the law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements
  5. 8. an element that conducts heat and electricity poorly
  6. 9. He determined the number of protons-the atomic number- in an atom
  7. 12. Groups 3-12
  8. 14. this was the name of the noble gases because scientists thought they would not reactive.
  9. 15. a vertical column of elements in a group share chemical properties
  10. 16. one of the elements of Group 1 of the periodic table
  11. 18. elements that undergo a process that allows them to combine to form into compounds
  12. 19. in chemistry, a horizontal row of elements in the periodic table
  13. 20. describes something that occurs or repeats at regular intervals
Down
  1. 2. one of the elements of Group 2 of the periodic table
  2. 3. a man who played chemical solitaire and made a table that became the Periodic table of the elements
  3. 7. Group 15
  4. 10. one of the elements of Group 17 of the periodic table
  5. 11. an element that is shiny and that conducts heat and electricity well
  6. 13. one of the elements of group 18 of the periodic table
  7. 17. an element that has properties of both metals and nonmetals