Definition of motor for English Language Learners : of, relating to, used in, or involving a vehicle that is powered by a motor (such as a car or motorcycle) : having a motor
Ancient Greeks and Romans used aluminum salts for dressing wounds. However, aluminum metal was not isolated until the 19th century. Danish chemist Hans Christian Ãrsted first produced aluminum in 1825 by reacting aluminum chloride with potassium amalgam. Therefore, Ãrsted is considered to be the discoverer of Aluminum.
Discovery: Swiss chemists Marc Delafontaine and Jacques-Louis Soret documented the special absorption bands of holmium in 1878, declaring it Element X.. Per Teodor Cleve later independently discovered the element while working on erbia earth, and the element is named after his native city.