Across
- 4. a mixture of two or more metals
- 6. an acid that ionises completely in water
- 9. exothermic reaction within cells that releases energy for the body’s use
- 10. the number of particles in a given volume
- 11. reaction a reaction involving an acid and a base to produce water and a salt
- 16. not planned
- 18. an ion that does not take part in the reaction
- 22. in the presence of oxygen
- 23. an acid that partially ionises (loses or gains electrons) in water
- 25. to wear down a substance
- 26. a biological catalyst that increases the rate of reactions in cells
Down
- 1. a reaction that absorbs energy in the form of heat
- 2. a compound made up of only hydrogen and carbon
- 3. an insoluble product
- 5. a reaction taking place in the presence of oxygen
- 7. change from one form to another
- 8. a reaction that involves burning in the presence of oxygen to release heat
- 12. a compound made up of carbon and hydrogen
- 13. a substance containing the elements carbon and oxygen
- 14. to split apart into ions
- 15. energy of motion
- 16. distributed throughout a fluid
- 17. in the absence of oxygen
- 19. an exothermic reaction requiring the presence of oxygen
- 20. substance that speeds up a chemical reaction
- 21. a reaction that releases energy in the form of heat
- 24. dissolved in water to create a solution