Chemistry

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Across
  1. 2. particles always touching but able to move
  2. 3. an amount of weight
  3. 5. has a big black cross to warn you
  4. 7. the warning symbol is a flame
  5. 10. is a black solid
  6. 13. a neutral charge in the middle of the nucleus
  7. 14. the warning symbol is a big skull and crossbones
  8. 15. this particle has a lot of kinetic energy
Down
  1. 1. an alkali begging with L and finishing with m
  2. 4. an acid starting with s and finishing with c
  3. 6. a negative charge in the middle of the nucleus
  4. 8. its a miniature building block
  5. 9. its a positive charge found in the middle of the nucleus
  6. 11. mass divided by volume
  7. 12. liquids are measured in it