Terbium


 * Element Name**: Terbium


 * Element Symbol**: Tb


 * Atomic Mass**: 159[[image:Terbium.png width="216" height="288" align="right"]]


 * Atomic Number**: 65


 * Protons**: 65


 * Electrons**: 65


 * Discovery**: It was discovered by Carl Gustaf Mosander in 1843.


 * How it was named**: Named after the village Ytterby.


 * State of Matter**: Solid


 * Melting Point**: 1356°C


 * Boiling Point**: 3230°C


 * Characteristics**:
 * Soft, can be cut with a knife
 * Silvery White
 * Can be cut into bars
 * Not made in a laboratory


 * Uses**:
 * As a laser material and emits coherent light at 5460A.
 * The oxide has potential as an activator for green phosphors used in colour TV tubes.


 * Interesting Facts**: Terbium is used in X-Ray machines. It is also used in fluorescent lamps.

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