KnowraNeptuniumLinked fromLinked fromThe 6 pages that link to Neptunium, each with the reason it gives.All 6Broader topic 4Compared with 2PlutoniumCompared with: It precedes plutonium in the actinide series and can be its immediate nuclear precursor.Transuranium elementBroader topic: It was the first element found beyond uranium.Edwin McMillanBroader topic: McMillan and Philip Abelson identified this first transuranium element by irradiating uranium.Actinide seriesBroader topic: It is the first transuranium element and links uranium to heavier actinides.Actinide conceptBroader topic: Its discovery helped establish that elements beyond uranium belonged to a coherent series.ProtactiniumCompared with: Neptunium lies just beyond protactinium and is generally human-produced rather than naturally abundant.