KnowraLanthanumLinked fromLinked fromThe 10 pages that link to Lanthanum, each with the reason it gives.All 10Broader topic 5Compared with 5LanthanideBroader topic: Its placement illustrates differing conventions about whether the series begins with lanthanum or cerium.Lanthanide contractionBroader topic: It marks the starting end of the series over which radii generally decrease.YttriumCompared with: It is a larger, more reactive neighbor whose chemistry overlaps with yttrium’s rare-earth behavior.CeriumCompared with: Lanthanum neighbors cerium but generally favors the +3 oxidation state.ScandiumCompared with: Unlike lanthanum, scandium is not a lanthanide and has no occupied 4f subshell in its neutral atom.Carl Gustaf MosanderBroader topic: Mosander identified it in 1839 after separating it from cerium compounds.MischmetalBroader topic: It is a common major constituent, accompanying cerium in commercial mischmetal.PromethiumCompared with: Lanthanum shows the stable, naturally abundant end of the lanthanide series near promethium.PraseodymiumCompared with: Lanthanum lacks praseodymium’s partially filled 4f shell, giving it different magnetic and optical behavior.Group 3 elementBroader topic: Alternative tables place it in Group 3 rather than lutetium.