Origin / Meaning of the name Selenium
The name originates from the Greek Selene, who was the Greek goddess of the moon because the element is chemically found with tellurium (Tellus - the Roman goddess of the earth).
Periodic Table Group and Classification of the of the Selenium Element
Elements can be classified based on their physical states (States of Matter) e.g. gas, solid or liquid. This element is a solid. Selenium is classified as an element in the 'Non-Metals' section which can be located in groups 14,15 and 16 of the Periodic Table. Non-metallic elements exist, at room temperature, in two of the three states of matter: gases (Oxygen, Hydrogen & Nitrogen) and solids (Carbon, Phosphorus, Sulfur and Selenium).
Facts about the Discovery and History of the Selenium Element
Selenium was discovered by Jons Jacob Berzelius in 1817
History of the Periodic Table
Check out the brief History of the Periodic Table which details dates and the names of famous scientists and chemists who contributed to the development of the Periodic Table.
Occurrence of the Selenium Element
Occurs as selenide in many sulfide ores
Obtained primarily as a by-product of electrolytic copper refining
Abundances of the element in different environments
% in Universe 3×10-6%
% in Sun N/A
% in Meteorites 0.0013%
% in Earth's Crust 5×10-6%
% in Oceans 4.5×10-8%
% in Humans 5×10-6%
Associated Uses of Selenium