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In chemistry, a reactivity series (or reactivity series of elements) is an empirical, calculated, and structurally analytical progression [1] of a series of metals, arranged by their "reactivity" from highest to lowest.
name: A contestant's name preceded by the numeral 4 signifies 4th place. 5. name: A contestant's name preceded by the numeral 5 signifies 5th place. 6. name: A contestant's name preceded by the numeral 6 signifies 6th place. 7. name: A contestant's name preceded by the numeral 7 signifies 7th place. (S## E##)