Linked from
The 32 pages that link to Superheavy element synthesis, each with the reason it gives.
UnunenniumBroader topic: Experiments must create and identify at least one nucleus with 119 protons.
Element 119Narrower topic: Element 119 is the next unconfirmed target in this experimental program.
UnbipentiumRelated: No demonstrated synthesis has established that element 125 can be made.
UnhexoctiumRelated: Any claim of element 168 would require producing and identifying its nuclei.
UnhexpentiumRelated: Existing synthesis methods have not established a route to atomic number 165.
UnbiseptiumNarrower topic: Its limits determine whether element 127 can be created and detected.
UnhexquadiumRelated: New production methods would be needed to test whether element 164 can be made.
UnpentpentiumRelated: Any claim of element 155 would require producing and identifying its nuclei.
UnquadenniumRelated: No demonstrated production pathway has reached atomic number 149.
UnquadtriumBroader topic: Any attempt to create element 143 would extend this experimental program.
UntrioctiumRelated: Experiments in this field would test whether untrioctium can be produced.
UntriquadiumRelated: No established method has produced an element anywhere near atomic number 134.