Lanthanum


 * Element Name**: Lanthanum


 * Element Symbol**: La


 * Atomic Mass**: 139[[image:Lanthanum_Vivian.png width="216" height="288" align="right"]][[image:Lanthanum.gif width="255" height="191" align="right"]]


 * Atomic Number**: 57


 * Protons**: 57


 * Electrons**: 57


 * Discovery**: Lanthanum was discovered by Swedish chemist Carl Gustaf Mosander in 1839.


 * How It Was Named**: Lanthanum came from the Greek word Lanthaneia, which means "to lie hidden."


 * State of Matter**: Solid


 * Melting Point**: 918°C


 * Boiling Point**: 3464°C

1. soft 2. color is silvery white 3. density is about 6 grams per cubic centimeter
 * Characteristics**:


 * Uses of Element**: Lanthanum is used to make carbon, camera lenses and special glasses.


 * Interesting Facts**: Lanthanum is one of the most reactive rare-Earth metals. When handling it you should be careful because it has a low moderate acute toxicity rating.

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