Across
- 3. starting substances in a chemical reaction.
- 9. substance that can damage materials or skin.
- 14. number scale from 0 to 14 used to show how acidic or alkaline a substance is.
- 15. rain that contains dissolved acidic gases such as sulfur dioxide.
- 17. reaction between an acid and a base that produces a salt and water.
Down
- 1. solution that contains a small amount of acid or alkali in a lot of water.
- 2. dioxide when an acid and carbonate react they form form a salt, water, and
- 4. way of showing a reaction using words instead of symbols.
- 5. chemical that changes colour to show if something is acidic or alkaline.
- 6. new substances formed in a chemical reaction.
- 7. pure substance made of only one type of atom.
- 8. made of two or more different elements chemically joined together.
- 10. substance that has a pH less than 7.
- 11. reaction reaction that forms new substances.
- 12. that reacts with an acid to make a salt and water.
- 13. that dissolves in water Dilute
- 16. then smallest part of an element that still has its properties.