Across
- 3. the most reactive non-metals
- 8. numerical prefix for five
- 9. a kind of change when a material changes state, (or appearance), but does not change composition. This process is reversible.
- 10. a chemical reaction that occurs when oxygen reacts to another substance to create a new one
- 12. smallest particle of matter with a negative charge
- 13. numerical prefix for two
- 14. can be easily separated
- 17. a kind of change where the reactants either create or turn into a new substance. This process is not reversible.
- 18. smallest particle of matter with a positive charge
- 19. an element that has metallic and non-metallic properties
- 21. the positively charged centre of an atom, made up of neutrons and protons
- 22. can be made into thin strands of wire
- 23. the smartest part of an element that is representative of that element, a neutral particle made up of protons, neutrons and electrons
Down
- 1. pure substance
- 2. a substance that helps speed up the rate of reaction between reactants
- 4. a chemical combination of two or more elements in a specific ratio
- 5. an organic catalyst
- 6. vertical groups of elements with similar properties
- 7. can not be separated easily
- 9. the new substance created in a chemical reaction
- 11. pounded or rolled into sheets
- 15. smallest particle of matter with a neutral charge
- 16. numerical prefix for one
- 20. numerical prefix for four
- 24. numerical prefix for three