1.

what is reactivity series?

Answer» A vertical of metals of metals in order to their reactivity in which the most reactive metal is placed at the top and least reactive metal is placed at the bottom
The activity series (also known as reactivity series) of metals is a series in which metals arranged in the decreasing order of reactivity. Thus the most reactive metal is placed at the top of the series while the least reactive metal is placed at the bottom of the series.
A vertical columns of metals in order of their reactivity...like reactivity decreases from top to bottom


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