KnowraFranciumLinked fromLinked fromThe 6 pages that link to Francium, each with the reason it gives.All 6Broader topic 3Related 1Compared with 2Alkali metalBroader topic: Francium marks the group’s rare, short-lived end; its chemistry is difficult to study directly.RubidiumCompared with: Francium lies below rubidium in Group 1 but is too scarce and unstable for practical use.AstatineRelated: Like astatine, it is a scarce, short-lived element found only in trace natural quantities.CaesiumCompared with: Francium lies below caesium in Group 1 but is too rare and unstable for practical clocks.Marguerite PereyBroader topic: It is the element Perey discovered and named after France.Period 7 elementBroader topic: It begins period 7 and has no stable isotopes.