Arsenic

= Arsenic=
 * Atomic Number:** 33


 * Protons:** 33


 * Electrons:** 33


 * Neutrons:** 42


 * Average Atomic Mass:** 74.922


 * Isotopes:** As-68, As-69, As-70, As-71, As-72, As-73, As-74, As-75, As-76, As-77, As-78, As-79

**Discovery:** The element was discovered in Chinese,Greek and Egyptian Civilizations. It was believed that Albertus Magnus contained the element in 1250 A.D.

**Name** : The element Arsenic comes from the Greek word "arsenikon" meaning "yellow [|orpiment]"

**Uses:** The element Arsenic is used to insecticides,termination and poisons to other things. For example lead hydrogen was well know in the 20th century to insecticide fruit trees. And sometimes resulted on a brain damage for those who worked with sprayers.


 * Interesting Facts:**Arsenic was the most toxic element that can be found. Arsenic was used to kill insects in the late 60's,but eventually was banned in the U.S. in 1988. 

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 * Video:**

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 * Sources**
 * **Photo**: [|Arsenic on Flickr Curious Expeditions]
 * **Video:** [|Arsenic from Periodic Videos on YouTube]
 *  __[|Arsenic on Wikipedia]__
 * [|History of Arsenic on WebElements>]
 *  __[|Arsenic on WebElements>]__
 * [|Arsenic Isotopes on Webelements]