Reducing agents are elements that causes reduction of other elements by itself losing an electron to an electron recipient in a reaction.When an element has 1, 2, or 3 electrons in its
outermost valence shell then it donates its electrons so that it can achieve a stable octet configuration. Alkali metals have one electron in their valence shell hence they are able to donate one electron very easily. That’s why Alkali Metals act as good reducing agents.
