|Classification||Rare Earth Metals|
|Atomic mass||138.9055 amu|
|Number of Stable Isotopes||2|
|Density (grams per cc)||6.145 g/cm^3|
|Date of discovery||1839|
|Name of discoverer||Carl Mosander|
|Name origin||From the Greek lanthanein, meaning to lie hidden.|
|Uses||Due to the refractive properties it adds to glass, it is used in expensive camera lenses. Also used in lighter flints, battery electrodes, catalytic converters, and as a biological tracer.|
|Obtained from||Found along with monazite and bastnasite.|
It has two stable isotopes (actually one, but another one has a half-life of 1011 years).
Lanthanum was discovered while searching for impurities in Cerium.
|Periodic Table of the Elements|