Technetium is so rare it couldn't be isolated until it was synthesized in a cyclotron in 1937, almost 70 years after Dmitri predicted its existence, 30 years after he died.
Teknetiumi është aq i rrallë saqë nuk mund të izolohej derisa u sintetizua në një ciklotron në 1937, gati 70 vjet pasi Dmitri parashikoi  ekzistencën e tij, 30 vjet pasi ai vdiq.