What is meant by Electro chemical series? Mention the top most and the least placed element in that series.

Explanation

(i) The standard aqueous electrode potential at `298K` for various metal-metal ion electrodes are arranged in the decreasing order of their standard reduction potential values is known as electro chemical series.
(ii) The stronget reducing agent is Li which has `E^@` value as -3.05 and it is in bottom of the series.
(iii) The strongest oxidising agent is F which has `E^@` value as `+2.87` is the first element in that series.