Thallium

 [[image:Thallium.001.png width="200" height="300" align="right"]]Thallium

 * Atomic Number:** 81


 * Protons:** 81


 * Electrons:** 81


 * Neutrons:** 123 


 * Average Atomic Mass:** 204.383 amu
 * Isotopes:** Tl-200, Tl-201, Tl-202, Tl-203, Tl-204, Tl-205


 * Discovery:** Thallium was founded by Sir. William Crookes in 1861 in England. 
 * Name:** Thallium was named from the Greek word "thallos" meaning green twig or green shoot because it produced a green line with spectroscopic analysis.


 * Uses:** Thallium is used to kill ants and rodents. It is also used in photocells (solar panels), and infrared detectors.

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 * Sources**
 * Photo: [|Nightvision Experience at Animal Kingdom by Mikethedigiartist on Flickr]
 * Video: [|Thallium on from Periodic Videos on YouTube]
 * [|Thallium on WebElements]
 * [|Thallium Uses on WebElements]
 * [|Thallium History on WebElements]
 * [|Thallium Isotopes on WebElements]