Across
- 2. A mixture designed to do something useful.
- 3. Reactive metal - purple flame.
- 7. Metals that make colourful compounds.
- 8. Group containing unreactive gases.
- 9. Model of the atom - a positively charged sphere with electrons randomly scattered.
- 10. Column on the periodic table.
- 12. Substance containing only one type of atom.
- 16. Positively charged subatomic particle.
- 17. Centre of an atom containing protons and neutrons.
- 19. Subatomic particle without a charge.
- 20. Row on the periodic table
Down
- 1. Method of separating mixtures of solutes with different solubilities.
- 4. Mass of an atom. (2)
- 5. Two or more elements or compounds mixed but not joined.
- 6. Group containing the halogens. e.g. chlorine
- 11. Group containing reactive metals e.g. potassium
- 13. Another name for the group 0 elements. (2)
- 14. Two or more elements chemically joined.
- 15. Negatively charged subatomic particle.
- 18. Smallest thing anything can be made from.