Per Teodor Cleve

Per Teodor Cleve (Stockholm, 10 February 1840 – Uppsala 18 June 1905,) was a Swedish chemist and geologist. ==Biography[ Edit] == Cleve graduated in 1858 on the Stockholm gymnasium and then began to study Mineralogy at the University of Uppsala. He obtained his doctorate in 1863 and was followed by teacher in chemistry. In the years 1866/67 undertook a journey through England, France, Italy Cleve and Switzerland. He also Later visited North America.

After returning to Sweden he became in 1870 Professor of chemistry in the Teknologiska Institute and from 1874 at Uppsala University. In1871 he was elected a fellow of the Royal Swedish Academy of Sciences and in 1894 he received the Davy medal of the Royal Society.

In 1874 showed Cleve to that, when seen as element didymium, actually two elements neodymium and praseodymiumexisted. In 1879 he discovered two previously unknown elements he holmium (Holmia, Latin name of Stockholm 's) and thulium (from Thule, the ancient name of Scandinavia) called. That same year, his research showed that the properties and position in the periodic table of the (21) by Lars Nilson discovered scandium element corresponded to the hypothetical ekaboron ' element ' that had been predicted by Dmitri Mendeleev . In his later years, he conducted an extensive study to plankton.

Cleve was married to schoolteacher Alma Öhbom. Their daughter, Astrid m. Cleve (1875-1968) was the first woman in Sweden who got a doctoraaltitel in the sciences. She married the Swedish biochemist born in Germany Hans von Euler-chelpin, Nobel Prize Laureate in 1929. His grandson, Ulf von Euler, would the 1970 Nobel Prize in Physiology or medicine get.