https://padlet.com/diego_maciasrosa/8a881kpplnx6 Hecho con un aura de misterio en-us 2017-12-19 11:20:17 UTC 2017-12-19 11:44:05 UTC hello@padlet.com diego_maciasrosa https://padlet.com/diego_maciasrosa/8a881kpplnx6/wish/217199772 Holmium is a chemical element with symbol Ho and atomic number 67. Part of the lanthanide series, holmium is a rare-earth element. Holmium was discovered by Swedish chemist Per Theodor Cleve. Its oxide was first isolated from rare-earth ores in 1878. The element's name comes from Holmia, the Latin name for the city of Stockholm.]]> 2017-12-19 11:41:49 UTC https://padlet.com/diego_maciasrosa/8a881kpplnx6/wish/217199772