INDUSTRY|chemistry|chemical element
- prótachtainiam Reference Faomhadh an téarma seo mar chuid de Thionscadal Lex
- ga
- Definition dúil thearc radaighníomhach arb í 91 a huimhir adamhach Reference Fiontar, Ollscoil Chathair Bhaile Átha Cliath (DCU), bunaithe ar: 'prótachtainiam'. Hussey, M. Fréamh an Eolais. Coiscéim, Baile Átha Cliath, 2011.
- Protactinium
- de
- Definition chemisches Element:Ordnungszahl 91 Reference Römpp,Chemie-Lexicon
- protactinium
- en
- Definition chemical element: atomic number 91 Reference "The International Union of Pure and Applied Chemistry (IUPAC) - Periodic Table of the Elements: http://www.iupac.org/reports/periodic_table/index.html#names (7/11/2007)"
- protoactinium
- fr
- Definition élément chimique: numéro atomique 91, symbole Pa Reference Grand dictionnaire encyclopédique Larousse
- Pa
- mul