Dab tsi yog qhov cobalt, nws muaj kev ruaj ntseg?
Cobalt yog lub hauv paus hlau, lub cim Co, silvery dawb. Lus Askiv lub npe Cobalt los ntawm lo lus German" Kobold" ;.
Cobalt tsis nyab xeeb. Cobalt yog cov hlau hnyav, yog li taw qhia BLUE silica gel (withcobalt chloride) tsis muaj zaub mov muaj kev nyab xeeb thiab yuav tsum khaws cia kom deb thiab zam kom tsis txhob ua rau cov khoom noj tau.

