Thulium


 * Element Name**: Thulium


 * Element Symbol**: Tm


 * Atomic Mass**: 169


 * Atomic Number**: 69


 * Protons**: 69


 * Electrons**: 69


 * Discovery**: Per Theodore Cleve in 1879


 * How it was named**: From the earliest name for Scandinavia, Thule


 * State of matter**: Solid


 * Melting Point**: 1545°C


 * Boiling Point**: 1950°C


 * Characteristics**:
 * Silvery White
 * Must be protected from moisture
 * Is Soft and
 * Can be cut with a knife


 * Uses**: Portable X-ray devices and Solid State Lasers


 * Interesting facts**:
 * Thulium is not usually found on earth
 * Thulium is relatively expensive
 * Thulium forms no commercially important compounds