Name:_______________
Date:__________
1. The _______ of fuels, the _________ of metals, __________ and ________ all involve oxidation and reduction.
2. When an element loses an electron, it is said to be ________.
3. When an element gains an electron, it is said to be _______.
4. _________ and _________ always occur together.
5. Oxidation-reduction reactions are often called _____ reactions.
6. The process by which a metal combines with water, air or other materials in the atmosphere is called _________.
7. The _______ of iron is an example of _________.
8. In the _______ of iron, the iron _____ electrons to the oxygen in water. So in _______, the iron is ________ and the oxygen in water is _______.
9. ____ _____ is rust.
10. ________ is also oxidized by the oxygen in water or air to form ________ _____. However, ______ _____ does not _______ like rust. A thin layer of ______ _____ will protect the layers of ________ below so that this corrosion does not continue.
11. ____ also loses an electron to oxygen to for ____ _____.
12. ____ _____, like aluminum oxide is not _______. The thin layer of ____ _____ protects the metal below so that it cannot be ________.
13. The process of coating iron with zinc is called _____________.
14. Nails are _____ galvanized with ____ to protect the iron from rusting.
15. Metals which give up electrons easily (______ ______) are said to be active.
16. The ________ of a metal refers to its tendency to give up _________.
17. When metallic elements are arranged according to their activity, this is known as an ________ ______.
18. _________, _________ and ________ are the most active metals.
19. ____, ________ and ______ are the least active metals.
20. In the activity series, a metal will give up electrons to any metal which is ______ it on the activity series.
21. When elements gain or lose electrons, they are no longer called ________, but _____.
22. Elements which gain electrons are called ________ ____.
23. Elements which lose electrons are called ________ _____.
24. Any ____ active metal will give up electrons to a ____ active metal.
25. Steel ships often have bars of ____ attached to the sides of the ship. As the _____ is corroded by the ______ of water and air, the ____ will give up _________ to the steel and protect it from _________.
26. The substance which gains electrons causes the _________, and it is called the _________ ______.
27. The substance which loses electrons causes the _________, and it is called the ________ _____.
28. Household bleach (______ ____________) is a very strong _________ _____.
29. Bleach removes ________ from stains and causes the stains to ____ ____.
30. Hydrogen peroxide is also an _________ _____. It can remove electrons from the _____ _______ of _____ causing it to lose its _____.
31. _____ is also a very strong _________ _____ and can damage __________, and can even damage plastic and rubber products, such as _____.
32. Substances called ____________ are added to food to prevent _________ and the resultant ________. These substances act as ____________ by reacting with the oxygen in the air, preventing the oxygen from _________ the food.
33. Any active metal will ____ __ electrons to a ____ active metal. This principle is used to make _____________ _____ (_________).
34. As a _____ active metal gives up electrons, they flow along a _________ to do work, and are accepted by the ____ active metal.
35. An __________ is a liquid or a paste which is a good conductor of electricity.
36. ______ and _____ are good electrolytes.