Chemistry revision

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Across
  1. 4. Solids and liquids cannot be __________ because there is no space between particles
  2. 5. One problem with the particle model is it doesn't accurately show particle _______
  3. 6. The _________ number = no. of protons + no. of neutrons
  4. 7. This particle has a relative mass of 1 and a positive charge
  5. 8. Where most of an atom's mass is found
  6. 10. Liquid --> gas using heat
  7. 12. This particle has a neutral charge
  8. 15. Another problem with the particle model is it doesn't accurately show ________ between particles
  9. 16. Solid --> liquid
  10. 17. This scientist did experiments with gold foil and alpha particles
  11. 18. Electrons have a _________ charge
Down
  1. 1. Which scientist developed the plum pudding atomic model?
  2. 2. Bohr developed the atomic model stating that electrons were found in ________
  3. 3. Liquid --> Solid
  4. 9. Liquids take the shape of their __________ because they can flow
  5. 11. Gas --> Liquid
  6. 13. Something made from two or more atoms joined together
  7. 14. Dalton thought atoms were like solid, indivisible ________