Periodic Table Crossword Puzzle

1234567891011121314151617181920
Across
  1. 1. What is group 17 called?
  2. 3. what is element 6 called?
  3. 5. What lives in the outer shell of a element?
  4. 7. how many periods are there in the Periodic table?
  5. 12. what is the largest group in the periodic table?
  6. 14. What is element 99 called?
  7. 15. How many valence electrons does group 18 have?
  8. 16. Elements will react/bond with other elements to gain 8 valence electrons .What is this called?
  9. 17. which element has the lowest atomic mass?
  10. 19. what is group 18 called?
  11. 20. How many valence electrons does group 2 have?
Down
  1. 2. which element has the highest atomic number?
  2. 4. what is the number of an element called?
  3. 6. what is group 1 called?
  4. 8. what type of charge does group 16 give?
  5. 9. what are the elements going up and down called?
  6. 10. why type of charge does group 13 give?
  7. 11. What are the horizontal rows called in the periodic table?
  8. 13. what is the number on the top left of an element called?
  9. 18. Is Carbon a metal, metalloid, or nonmetal?