Periodic Table Crossword

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Across
  1. 4. What’s the name for Group 7 on the Periodic Table?
  2. 5. Who left gaps in his Periodic Table for new discoveries?
  3. 7. These elements release energy and can give you cancer. What kind are they?
  4. 9. The group number tells you how many of these are in the outer shell.
  5. 11. What is the name for Group 1 on the Periodic Table?
  6. 12. The period number tells you how many of what there are?
Down
  1. 1. What element has the abbreviation Fe?
  2. 2. What element has the abbreviation Mg?
  3. 3. What is the name for Group 0 on the Periodic Table?
  4. 6. Which group of elements reacts with water?
  5. 8. How did John Newlands group the elements?
  6. 10. How did Johann Wolfgang Döbereiner organize the elements?