Quantum redactiones paginae "Protactinium" differant

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[[Fasciculus:Pa-TableImage.pngsvg|thumb|Protactinium in [[Systema periodicum|systemate periodico]].]]
'''Protactinium'''<ref>"Protactinium": Peter van der Krogt, "[http://www.vanderkrogt.net/elements/list_element.php?language=la&sort=A Elementa chemica]" apud situm ''Elementymology & Elements Multidict''</ref> {{victio|Protactinium|ii|n}} est [[elementum]] [[chemica|chemicum]] [[systema periodicum|systematis periodici]] ex [[actinida|actinidis]].