Discovered by Carl G. Mosander and Axel Erdmann

Solid Metal of the Lanthanide Family

Symbol: La, 57 protons, 57 electrons, 82 neutrons

Atomic #: 57

Atomic Mass: 138.9

Melts at 1540°c and boils at 2830°c

Cost for 100 grams is $800

Important Uses

The name comes from the Greek word lanthano

Means: "to be hidden"