What is Unbiennium?
{{Infobox unbiennium}}'''Unbiennium''' is an [[element]] on the periodic table's superactinide<ref>{{Cite journal|date=2020-10-07|title=Periodic table|url=https://simple.wikipedia.org/w/index.php?title=Periodic_table&oldid=7136366|journal=Simple English Wikipedia, the Free Encyclopedia|language=en}}</ref> series. ==References== {{reflist}} {{Extended periodic Table}} {{chemistry-stub}} [[Category:Hypothetical chemical elements]]