"IB & A Level Redox Crossword": HTML5 Crossword

Across

1. The old name for the sulphate(IV) ion (8)
3. The fuel in some space rockets (8)
4. When two half equations are combined, they must then be ........................... (8)
6. Oxygen behaving unusually (9)
9. The old name for the nitrate(III) ion (7)
11. Important redox reaction for autotrophs (14)
12. During oxidation, hydrogen is ....................... (4)
13. A metal used for sacrificial protection (9)
14. A kind of protection from rusting used especially in seawater (11,0)
15. The oxidation number of an element in a ....................... ion is always the same as the charge. (9)
16. The halogens are all ........................... agents (9)
18. This kind of equations has electrons in it (4)
19. The oxidation number of the chlorine in HClO4 (5)

Down

2. Rust is .......................... iron (III) oxide (8)
5. Gain of electrons or hydrogen or the loss of oxygen (9)
7. Percentage of iron & steel that is damaged by rusting each year (6)
8. The nitrate ion is an example of a ............................ ion (8)
10. Redox occuring in your cells right now (11)
16. A useful acronym (6)
17. The name given to the IO3- ion (6)