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Author: WikiMatrix
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Bosnian[bs]
Škotski hemičar William Ramsay 26. marta 1895. godine uspio je izolirati helij na Zemlji tretiranjem minerala cleveita (jednog oblika uraninita sadržaja najmanje 10% rijetkih zemnih elemenata) mineralnim kiselinama.
English[en]
On March 26, 1895, Scottish chemist Sir William Ramsay isolated helium on Earth by treating the mineral cleveite (a variety of uraninite with at least 10% rare earth elements) with mineral acids.