Across
- 2. Positively charged particles.
- 3. Neutral particle
- 5. When non metals combine.
- 7. Materials at the start of a reaction.
- 11. Takes place when two or more substances combine to form a new substance.
- 17. Materials produced by a reaction.
- 18. Gas to solid.
- 20. Most stable and unreactive element.
- 23. Solid to a gas.
- 24. The amount of mass in a given volume of a substance.
- 25. The smallest part of an element.
Down
- 1. Anything that has mass and occupies space.
- 4. Heat being given off
- 6. Most reactive metals.
- 8. The most reactive non metals.
- 9. Element that has both metallic and non metallic properties.
- 10. Slow chemical change that occurs when air reacts with metal.
- 12. Substances formed as a result of the attraction between particles of opposite charges.
- 13. Negatively charged particle in an atom.
- 14. Positively charged centre of an atom.
- 15. Absorption of heat.
- 16. A pure substance that cannot be broken down any further.
- 19. An atom that has become electrically charged.
- 21. Catalyst involved in chemical reactions in living things.
- 22. Substances that help a reaction proceed faster.