praseodymium
The 59th element on the periodic table. The metal belongs to the lanthanides at the bottom of the table. It is almost as soft as aluminum and will slowly corrode in dry or moist air. A fresh sample will lose it's shine in a week and a small piece will be consumed in a few years if not stored in oil or inert gas. You can wipe off the forming oxide layers to abate spalling and further exend the life of the metal. It reacts very slowly with water. Praseodymium is rapidly consumed by various acids. The compounds of Praseodymium are yellowish green and are non toxic if insoluble. The metal likes to set on fire if heated The name translates from "green twin" in greek.
Praseodymium belongs to the lanthanides, those metals at the bottom of which no one can pronounce the names of.
praseodymium by Underplaces July 12, 2017
