| A | B |
|---|
| react | to take part in a chemical reaction |
| rust | a reddish-brown oxide coating on iron or steel caused by oxygen and water |
| tarnish | change in color on the surface of a metal; caused by an oxidation reaction |
| oxidation | a reaction in which a substance joins with oxygen |
| metal hydroxide | an alkaline metal compound that has an –OH group |
| phenolphthalein | an indicator that turns hot pink if a solution is alkaline |
| reactivity series | a list in which elements are arranged in order of how reactive they are |
| order of reactivity | shown by the reactivity series, which has the most reactive element at the top and then lists the others in order of decreasing reactivity |
| independent variable | the variable that is changed or manipulated |
| dependent variable | the variable that is measured |
| *corrosion | break down of a metal by a chemical reaction |
| *valence electron | an electron in the outer electron shell of an atom |
