A shekara ta 1937, technetium (musamman technetium-97 isotope) ya zama na farko da aka samar da wucin gadi, sabili da haka sunansa (daga Helenanci τεχνητός, ma'ana "synthetic ko wucin gadi", + -ium). Tambaya: Wanene masanin kimiyya wanda ya annabta yawancin kaddarorin technetium kafin gano shi?
Dmitri Mendeleev