Periodic Table of Elements Crossword

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Across
  1. 3. What element has the atomic number 82 on the periodic table?
  2. 7. Which direction does atomic radius increase?
  3. 9. What is the second most reactive element in alkali metals?
  4. 10. What element has the least electron shells?
  5. 13. Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, Astertine
  6. 16. Atoms attract electrons towards itself
  7. 18. Element organisms need to survive
  8. 19. What material makes up most of the periodic table?
  9. 20. What element is the heaviest?
Down
  1. 1. What represents the number of valence electrons on an atom?
  2. 2. What element has the largest atomic radius?
  3. 4. What is the name of the 18th column in the periodic table?
  4. 5. What is the most reactive element in the Halogens?
  5. 6. What is the element with the lowest boiling point?
  6. 8. What element has the atomic number 38?
  7. 11. Who proposed the idea of the periodic table?
  8. 12. What is the name of the metals in column one?
  9. 14. What element has the highest boiling point?
  10. 15. Which direction does atomic radius decrease?
  11. 17. What represents the number of shells on an atom?