Thulium

 =Thulium=


 * Atomic Number:** 69


 * Protons:** 69


 * Electrons:**69


 * Neutrons:** 101


 * Average Atomic Mass:** 168.934


 * Isotopes:** 100  

**Discovery:** Per Theodor discovered Thulium in 1879 while working on erbium oxcide.

The pure metal has a bright, silvery lustre. The metal must be protected from moisture. The element is silvery-grey, soft, malleable, and ductile, and also can be cut with a knife. It is a rare metal on earth found in minerals like monazite.  http://www.youtube.com/v/CQFDIZfMPVQ&hl=en&fs=1
 * Name:** Thulium was named after "Thule" which is an ancient name for " Scandinavia"
 * Uses:** 
 * 169Tm bombarded in a nuclear reactor can be used as a radiation source in portable X-ray equipment
 * natural thulium has possible use in ferrites (ceramic magnetic materials) used in microwave equipment
 * alloys
 * Interesting Facts**:  Thulium is the least abundant of earth's elements, and is as rare as silver, gold, or cadmium.
 * Video:** Thulium is a very rare element that is used to be on the periodic table of elements.

Sources 
 * Photo: [|Microwave by Existence Denied on Flickr]
 * Video: Thulium from Periodic Videos on YouTube
 * Thulium on WebElements