chemistry

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Across
  1. 3. the particle that has no electrical charge the exists in the neutron
  2. 5. used in electric lights to help them glow
  3. 7. a chemical element found in the air as a colourless odourless tasteless gas that is necessary for life
  4. 8. the base of chemistry, physics and biology
  5. 11. the negative charge that travels around the nucleus
  6. 12. salt
  7. 14. a table of the elements arranged in order of their atomic number
  8. 15. it makes balloons float and your voice high pitched
Down
  1. 1. the positive charge exists in the nucleus
  2. 2. something you can get from food caffeine and sugar and powers your brain
  3. 4. a poisonous pale yellow gas that is the most reactive element
  4. 6. the core of an atom
  5. 9. the type of science that studies matter and energy
  6. 10. the basic building block of all matter
  7. 13. pure substance made up from a single type of atom