Across
- 3. change of state from a solid to a liquid
- 6. speeds up a chemical reaction
- 8. brittle element that does not conduct electricity
- 10. chemical change that happens when oxygen reacts with a metal
- 11. combination of two or more elements in a specific ratio
- 12. group of atoms
- 13. an experiment where materials can escape
- 15. number of protons
- 17. when at least one metal and one non-metal are combined
- 20. group 1
- 21. negatively charged particle
Down
- 1. shiny element that conducts electricity
- 2. amount of mass in a given volume
- 4. element that has both metallic and non-metallic properties
- 5. anything that has mass and occupies space
- 6. when all materials in an experiment are accounted for
- 7. vertical column in the table of elements
- 9. ability of a substance to conduct electricity or heat
- 10. combination of symbols that represent a compound
- 14. catalyst involved in chemical reactions in living things
- 16. group 18
- 18. positively charged centre of an atom
- 19. group 17
- 20. mass of one atom of an element calculated from the total number of protons
- 22. cloudy mixture