Across
- 2. a gas that is present within a humans stomach to digest there foods
- 3. when energy is absorbed from its surrounding
- 5. corrosive substances that break down substances
- 6. a substance that is produced in all neutralisation reaction
- 7. states that matter can be neither destroyed nor created during a chemical reaction
- 10. the result that is formed towards the end of a reaction
- 11. a substance that reacts with oxygen releasing heat
- 15. a substance participating in a chemical reaction
- 16. when an acid and base react with each other
- 19. Solid, Liquid or Gas
- 20. react with solid substances which then break them down
Down
- 1. A process that involves rearrangement of the molecular or ionic structure of a substance
- 4. states that a compound, no matter how it is formed, always contains the same relative amounts of each element
- 8. the smallest particle of a chemical element that can exist
- 9. are substances that are used to tell whether a substance is a Acid or Base
- 12. a substance that is incapable to dissolve
- 13. describes how acidic or basic a substance is
- 14. have a bitter taste and feel slippery or soapy to touch
- 17. release energy
- 18. a substance that is able to dissolve