Selenium is an element it was "made" in the nova of an exploding star several billion years ago.
Selenium is found on Earth in minerals such as pyrites where it partially replaces the sulfides. Native selenium is very rare. Most elemental selenium on the market comes as a byproduct of metal refining such as copper or the production of sulfuric acid.
Selenium is a naturally occurring element. It is rarely found in nature as a pure element. It can be found in metal ores such as:
Berzelianite (Copper Selenide)
Clausthalite (Lead Selenide)
Eucairite (Silver Copper Selenide)
Hakite (Copper Mercury Silver Antimony Selenium Sulfide)
Klockmannite (Copper Selenide)
Palladseite (Palladium Selenide)
Penroseite (Nickel Selenide)
Selen-tellurium (Selenium Tellurium)
Tiemannite (Mercury Selenide)
Umangite (Copper Selenide
Pure selenium is usually produced as a by-product of refining copper sulfide for copper, where it is an impurity.
Some application of selenium are:
- vulcanization agent
- pigment for glass
- photocells
- additive in the process of manganese extraction by electrolysis
- component of alloys
it is used mainly for gases and heating oils, thus having the correct number of neutrons protons and electrons
i know a photophone device that was invented by alexander graham bell and it uses selenium to send signal at a distance
Selenium is found in nature as selenide ores
found in nature
buy some anti dandruf shampoo
Can selenium sulfide be used in treatment for lice?
No. the current formulation does not include selenium sulfide
CANDID - TV is the brand name of shampoo containing Selenium sulfide in India. It is made by GLENMARK Laboratories.
the geometry of the central atom is trigonal pyramid and the shape of the compound will be bent
Selenium dioxide, SeO2
Can selenium sulfide be used in treatment for lice?
Selenium sulfide is used against tinea capitis.
No. the current formulation does not include selenium sulfide
CANDID - TV is the brand name of shampoo containing Selenium sulfide in India. It is made by GLENMARK Laboratories.
Dandruff
This is a "decomposition" reaction.
CrS3 is the formula of chromium(VI) sulfide
the geometry of the central atom is trigonal pyramid and the shape of the compound will be bent
Selenium dioxide, SeO2
Sulfide is made up of many different elements. Sulfide can also make up several different compounds such as: Hydrogen Sulfide, Cadmium Sulfide, and Calcium.
Selenium shampoo is used for infections involving the fungus called malassezia furfur which is the cause of seborrhoeic dermatitis or seborrhoeic eczema. This condition is characterised by itchy, greasy skin on the face especially around the eyes and sides of the nose. By using selenium on the skin it controls the rash in irritation.
Selenium is a nonmetallic element with an atomic number of 34 and an atomic weight of 78.96. Its chemical symbol is Se. Selenium is most commonly found in nature in its inorganic form, sodium selenite. An organic form of selenium, selenomethionine, is found in foods