Roentgenium

 =Roentgenium =


 * Atomic Number:** 111


 * Protons: 111** 


 * Electrons:** 111


 * Neutrons: 161** 


 * Average Atomic Mass:** 272


 * Isotopes:** No common know isotopes


 * Discovery:** Roentgenium was discovered on 8th December 1994 at the GSI in Darmstadt, Germany.
 * Name:** Named after Roentgen, a German chemist and physicist who discovered X-rays during the late 1800s


 * Uses:**  No uses for Roentgenium


 * Interesting Facts**: Only a few atoms of this element have been named.

media type="youtube" key="eB69L94mGLQ" height="344" width="425" >
 * Video:** 
 * Sources**
 * Photo: [|Wilhelm Congrad Roentgen by 1way2rock on Flickr]
 * Video: [|Roentgenium on the Periodic Table of Videos on YouTube]