Across
- 2. A term used to describe oxidised organic meterial
- 3. A chemical reaction in which a substance reacts with oxygen-the reaction is exothermic
- 5. A liquid subtance
- 6. a number given to show whether an element has been oxidation reduce
- 8. a reaction involving both reductions and oxidation
- 10. A element symbol of natrium
- 11. air substance
Down
- 1. the name given to the process that take place when metal and alloys are chemically attacked by oxygen
- 4. A subtance that reduce anither subtance redox reaction and it self oxidised during the reaction
- 5. A element with 1 atomic number
- 7. the chemical reaction by biology cell release the energy stored in glucose
- 9. A element symbol of chlorine