Alkali metals are very strong reducing agents. The species having negative values of standard reduction potential or the species lying below hydrogen in the electrochemical series show a strong tendency to lose electrons to undergo oxidation and hence they are strong reducing agents. With the decrease in the standard reduction potential value of a given species the tendency of that species to lose electrons to undergo oxidation increases and hence the reducing power also increases. Alkali metals have high negative values and hence they are strong reducing agents. Lithium has the maximum negative value and hence it is the strongest reducing agent among the alkali metals.