In introductory chemistry, the reactivity series or activity series is an empirical series of metals, in order of "reactivity" from highest to lowest. It is used to summarize information about the reactions of metals with acids and water, single displacement reactions and the extraction of metals from their ores.
Going from bottom to top, the metals:
- increase in reactivity;
- lose electrons more readily to form positive ions;
- corrode or tarnish more readily;
- require more energy (and different methods) to be separated from their ores;
- become stronger reducing agents.
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