Selenium

=Selenium=


 * Atomic Number:** 34


 * Electrons:** 34


 * Neutrons:** 45


 * Average Atomic Mass:** 78.96


 * Isotopes:** 74Se, 76Se, 77Se, 78Se, 80Se, 82Se, 70Se, 71Se, 72Se, 73Se, 75Se, 79Se, 81Se, 83Se, 84Se.


 * Discovery: Jons Jacob Berzelius discoverd selenium.**He reported that tellurium was present in sulphuric acid from a Swedish factory, but in the following year decided that the impurity was not tellurium but another closely related element that he subsequently identified as selenium.
 * Name:** Came from the greek word "Selene" wich means moon.


 * Uses:** It is used in stainless steel.


 * Interesting Facts**:Selenium exhibits both photovoltaic action, where light is converted directly into electricity, and photoconductive action, where the electrical resistance decreases with increased illumination.

[|Selenium on the Periodic Table of Videos] [|history of selenium webelements] [|isotopes of selenium web elements] [|nealrabogliatti's photostream on flickr] [|Uses of Selenium on webelements]
 * Video:media type="youtube" key="IHrUtKjcAFE" height="344" width="425"**
 * Sources**