physics and chemistry

123456789101112
Across
  1. 2. is negative charge
  2. 8. is neutral charge
  3. 9. used for mixtures
  4. 10. a tool used to watch very small things in a lab
  5. 11. stop the water
Down
  1. 1. is positive charge
  2. 3. is complusory in laboratory
  3. 4. name given to a proton or a neutron
  4. 5. the english for " fer"
  5. 6. we can manipulate on it
  6. 7. the english for " amidon en poudre "
  7. 12. composed of electrons protons and neutrons