Interesting Facts about the Origin and Meaning of the element name Selenium

What are the origins of the word Selenium ?
The name originates from the Greek word 'selene' meaning Moon.

Facts about the Classification of the Element Selenium
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-metals are not easily able to conduct electricity or heat and do not reflect light . Non-metallic elements are very brittle, and cannot be rolled into wires or pounded into sheets. Non-metallic elements exist, at room temperature, in two of the three states of matter : gases (such as oxygen) and solids (such as carbon).

Brief Facts about the Discovery and History of the Element Selenium
Selenium was discovered by Jons Jacob Berzelius in 1817

Occurrence of the element Selenium
Occurs as selenide in many sulfide ores
Obtained primarily as a by-product of electrolytic copper refining

Common Uses of Selenium
TV cameras
Xerography
Photographic equipment

The Properties of the Element Selenium
Name of Element : Selenium
Symbol of Element : Se
Atomic Number of Selenium : 34
Atomic Mass: 78.96 amu
Melting Point: 217.0 °C - 490.15 °K
Boiling Point: 684.9 °C - 958.05005 °K
Number of Protons/Electrons in Selenium : 34
Number of Neutrons in Selenium : 45
Crystal Structure: Hexagonal
Density @ 293 K: 4.79 g/cm3
Color of Selenium : gray, red & black