Name : Neodymium Symbol : Nd Atomic # : 60 Atom weight: 144.24 Melting P. : 1021 Boiling P. : 3074 Oxidation : +3 Pronounced : nee-eh-DIM-i-em From : Greek neos + didymos, "new" + "twin" Identified : Carl Auer von Welsbach in 1885 Appearance : Silvery-white, rare-earth metal that oxidizes easily in air Note : The third most abundant rare-earth element [Properties] Neodymium is reactive with both air and moisture. In dry air, it tarnishes to form the light-blue oxide that flakes away and exposes more metal tha tis susceptible to further oxidation. It reacts with water to form neodymium hydroxide and hydrogen gas - a reaction that becomes more vigorous at higher temperatures. Because this metal is so reactive to normal environmental conditions, it is shipped and stored in containers of mineral oil and other nonreactive liquids. Neodymium, aside from being a rare-earth metal, is also a member of the lanthanide series of elements - a series that begins with lanthanum (element 57) and ends with lutetium (element 71).