N'afọ 1937, technetium (ọkachasị isotope technetium-97) ghọrọ ihe mbụ a na-emepụta, ya mere aha ya (site n'asụsụ Grik τεχνητός, nke pụtara "synthetic ma ọ bụ artificial", + -ium). Ajụjụ: Onye bụ ọkà mmụta sayensị nke buru amụma ọtụtụ ihe nke technetium tupu nchọpụta ya?
Dmitri Mendeleev