crossword 3

1. group 17 elements
4. gain electrons
7. the corrosion of iron
9. a fine solid that is formed by a chemical reaction involving liquids or gases
12. salt with water of crystallisation
15. complete dissociation
17. the reaction that acid reacts with base to form salt and water
19. a substance that reduces another substance and is itself oxidised

2. a term represented by roman numeral in word formula
3. salt without water of crystallisation
5. a substance can react with both acids and bases
6. the ease of atoms to lose or gain electrons
8. A reaction in which a more reactive element will displace a less reactive element from its compound
10. partial dissociation
11. group 1 elements
13. a mixture of two or more metals
14. lose electrons
16. proton acceptor
18. proton donor
20. soluble base