Cobalt "goblin", a superstitious term used for the ore of cobalt by miners. The first attempts to smelt those ores for copper or nickel failed, yielding simply powder (cobalt(II) oxide) instead. Because the primary ores of cobalt always contain arsenic, smelting the ore oxidized the arsenic into the highly toxic and volatile arsenic oxide, adding to the notoriety of the ore. Swedish chemist Georg Brandt (1694–1768) is credited with discovering cobalt circa 1735, showing it to be a previously unknown element, different from bismuth and other traditional metals. Brandt called it a new "semi-metal". He showed that compounds of cobalt metal
Element Hunters their own concerns, Ren, Chiara, and Homi, three average middle school students from Earth, banded together to also become Element Hunters. With the help of Professor Aimee Carr and Juno, they are able to help save their own planet. The team made up of children who have the ability to go to "Nega Earth." They are taken from Earth early in their lives and trained in the Space Colony to become Element Hunters. Element Hunters In the year 2029, chemical elements such as oxygen, carbon, gold, molybdenum, and cobalt were continually disappearing from Earth. These disappearing elements ultimately disrupted the