Lanthanum


 * Element Name**: Lanthanum


 * Element Symbol**: La


 * Atomic Mass**: 139[[image:Lanthanum.png width="216" height="288" align="right"]]


 * Atomic Number**: 57


 * Protons**: 57


 * Electrons**: 57


 * Discovery**: Discovered by Carl Gustaf Masander in 1839


 * How it was named**: From the Greek word "Lanthaneim" meaning "to lie hidden"


 * State of Matter**: Solid


 * Melting Point in °C**: 918°C


 * Boiling Point in °C**: 3464°C


 * Characteristics:**
 * Lanthanum is a silvery white color.
 * non-radioactive
 * non-explosive
 * soft


 * Uses:** Used in carbon lighting application

Lanthanum is one of the most reactive of the rare earth metals.
 * Two Interesting Facts**: Lanthanum is soft enough to cut with a knife.

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