Linked from
The 15 pages that link to Transuranium element, each with the reason it gives.
AmericiumNarrower topic: Americium belongs to the synthetic elements beyond uranium.
CaliforniumRelated: Californium lies among the synthetic elements beyond uranium.
Actinide seriesNarrower topic: Most elements beyond uranium in the series were made artificially.
NeptuniumNarrower topic: Neptunium was the first element discovered beyond uranium.
MendeleviumNarrower topic: Mendelevium was the ninth transuranium element discovered.