Lanthanum
Definition: Lanthanum is a chemical element; it has symbol La and atomic number 57. It is a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air. It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum is the first and the prototype. source: Wikipedia
- ID
- 414568004
- ID date
- 11 Jun 2009
- Previous ID
- 11279011000001105
- Name
- Lanthanum