Chemistry shenanigans by Joey

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Across
  1. 1. First atomic model made?
  2. 3. First noble gas on the periodic table?
  3. 6. Circles around an atom
  4. 7. most reactive metal type?
  5. 9. Last element on the periodic table?
  6. 11. another name for a group on the periodic table?
  7. 12. what do we breathe out?
  8. 17. A knife thrown into a wall (type of change)
  9. 20. from liquid to solid
  10. 21. Which direction do atoms get bigger as you go? (North, east, etc)
Down
  1. 2. from solid straight to gas
  2. 4. from liquid to gas
  3. 5. (not a cell!) the centre of an atom
  4. 8. The term to describe how greedy an atom is?
  5. 10. what do we breathe in?
  6. 13. gas type that no longer reacts with anything else?
  7. 14. (QUESTION FOR THE FUNNIES) What element do i want to put into a bottle to throw as an IED? (Please do not do at home)
  8. 15. what is a gas produced from a reaction called (hint change type)
  9. 16. First Element on the periodic table?
  10. 18. Direction of Greediness on periodic table? (North? east? south? west? (etc)
  11. 19. what else is a group known as on the periodic table?