Chemistry Crossword

2. A substance that can accept of neutralise hydrogen ions.
3. A molecule that can donate a proton or accept a pair of electrons in reactions.
5. A positively charged particle.
7. Damage caused to a metal or stone.
9. The process of decay.
11. A fast chemical combination of a substance with oxygen.
13. Where substances act with each other, or change into a new substance.
14. A compound with chemical properties.
16. A particle that has lost or gained one or more electrons.
17. The power of combined elements.
19. A non-charged /neutral particle.
20. Elements that occupy a column on the periodic table.
21. A negatively charged ion.

1. Elements that occupy a horizontal row on the periodic table.
4. A positively charged ion.
5. The result of a chemical reaction.
6. The process of precipitating a substance from a solution.
8. The bond of two or more elements.
10. A negatively charged particle.
12. A substance that speeds or slows down a reaction without getting involved.
15. A combination of element symbols.
18. a substance that is added to cause a chemical reaction,
21. A particle that makes up everything.