Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Dmitri Mendeleev ya annabta yawancin kaddarorin technetium kafin a gano asalin. Mendeleev ya lura da wani rata a cikin tsarinsa na zamani kuma ya ba da sabon abu da ba a gano ba sunan wucin gadi ekamanganese (Em). A cikin 1937, technetium (musamman technetium-97 isotope) ya zama farkon asalin da aka kirkira, saboda haka sunansa (daga Girkanci τεχνητός, ma'ana "wuta ko wucin gadi", + -ium).  Tambaya: Wanene masanin kimiyya wanda ya annabta yawancin kaddarorin technetium kafin gano shi?
Dmitri Mendeleev