What is a less active alkali metal?

A less active alkali metal refers to those elements in Group 1 of the Periodic Table that are less reactive than their counterparts, such as lithium (Li), sodium (Na), and potassium (K). Among the alkali metals, lithium is generally considered the least reactive, followed by sodium. The reactivity of alkali metals increases down the group, so francium (Fr) is the most reactive, while lithium exhibits the least vigorous reactions with water and other substances.