Yini insimbi engavamile?
Eminyakeni embalwa edlule, imvamisa sizwa "inkinga yensimbi engavamile" noma "inkinga yensimbi engavamile". Igama elithi, "insimbi engavamile", alilona umuntu ochazwe ngokwezifundo, futhi akukho ukuvumelana lapho kuvela khona. Muva nje, leli gama livame ukusetshenziselwa ukubhekisa kwizinto zensimbi ezingama-47 zensimbi eziboniswe kuMdwebo 1, ngokusho kwencazelo ebekiwe ngokujwayelekile. Kwesinye isikhathi, izinto zomhlaba ezingandile eziyi-17 zibalwa njengohlobo olulodwa, futhi inani libalwa njengezingu-31. Kunezinto ezingama-89 ezikhona ezingama-89 emhlabeni wemvelo, ngakho-ke, kungashiwo ukuthi ngaphezu kwengxenye yezinto ezingavamile.
Izinto njengeTitanium, Manganese, Chromium, ezitholakala ngobuningi ekuqothulweni komhlaba, nazo zibhekwa njengezinsimbi ezingavamile. Lokhu kungenxa yokuthi i-manganese ne-chromium bezike zaba yizinto ezibalulekile zomhlaba wezimboni kusukela ezinsukwini zayo zokuqala, zisetshenziswa njengezengezo zokuthuthukisa izakhiwo zensimbi. I-Titanium icatshangelwa ukuthi "akuvamile" ngoba kuyinsimbi enzima ukukhiqiza njengoba ubuchwepheshe obuphezulu buyadingeka ukuze kucwengezele i-ore eningi ngohlobo lwe-titanium oxide. Ngakolunye uhlangothi, kusukela ezimweni zomlando, ngegolide nangesiliva, obekukhona kusukela ezikhathini zasendulo, abizwa ngokuthi izinsimbi ezingavamile, izimo zomlando ezivela ezikhathini zasendulo, azibizwa njengezinsimbi ezingavamile.
