MATTER CROSSWORD

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Across
  1. 2. it is what is in the periodic table
  2. 4. it makes us the world
  3. 7. the person cameup with the hydrogen atom theory
  4. 9. a molecule with positive and negative atoms
  5. 11. is the negatively charged part of atom
  6. 13. columns in the periodic table
  7. 14. is the part of the atom that hold the DNA
  8. 16. the opposite of positive
  9. 17. a negatively charged ion
  10. 18. did the gold foil experiment
  11. 20. the outer shell of the atom
  12. 21. the person who came up with the idea of atoms
Down
  1. 1. the opposite of negative
  2. 3. made the plumb pudding diagram
  3. 5. the same type of atoms in a group
  4. 6. H2O
  5. 8. a positively charged ion
  6. 9. a different variant of a atom
  7. 10. is the positive part of the atom
  8. 12. is the neutral part of the atom
  9. 14. in the middle
  10. 15. is the place around the atom
  11. 19. rows in the periodic table