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Element Selenium, Se, Non MetalAll about Element Selenium, Se, Non Metal
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All about Element Selenium, Se, Non Metal
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Element Selenium, Se, Non Metal | selenium.atomistry.com Reviews
https://selenium.atomistry.com
All about Element Selenium, Se, Non Metal
selenium.atomistry.com
Selenium Ionization Energy
http://selenium.atomistry.com/energy.html
The Selenium Ionization Energy. Is the energy required to remove from atom one mole of electrons with subsequent production of positively charged ion of Selenium. This process can be repeated many times, but the energy cost is increased dramatically. The general equation for the Selenium is:. 9409 kJ/mol = 225.10 Kcal/mol. 2044 kJ/mol = 489.00 Kcal/mol. 2974 kJ/mol = 711.48 Kcal/mol. 4144 kJ/mol = 991.39 Kcal/mol. 6590 kJ/mol = 1576.56 Kcal/mol. 7883 kJ/mol = 1885.89 Kcal/mol.
Colloidal Selenium
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Selenium is readily obtained in the form of a colloidal solution, red by reflected light and blue by transmitted light. Such solutions were first obtained by Schulze by the reduction of selenium dioxide in dilute aqueous solution by means of the requisite quantity of sulphur dioxide:. With more concentrated solutions some selenium was also precipitated, which, however, on dilution dissolved in the hydrosol. 2 to 2.8 Na. Is not exceeded in the reduction. Particles of colloidal selenium are obtained which ...
Allotropy of Selenium
http://selenium.atomistry.com/selenium_allotropy.html
The analogy of selenium with sulphur is observable in the occurrence of allotropy, although no rigid relationship can be traced between the various forms of the two elements. Gaseous Dissociation of Selenium. As with sulphur, determinations of the vapour density of selenium give indications of alteration in the molecular condition, the values up to 900 C. suggesting a mixture mainly of Se. Molecules; below 550 C. there may be a small proportion of Se. Molecular Complexity in Solution. If the concentratio...
Physical Properties of Selenium
http://selenium.atomistry.com/physical_properties_selenium.html
Physical Properties of Selenium. The mean specific heats of the various forms are given in the following table:. Temperature Range, C. In order to explain this remarkable property of selenium many theories have been put forward, most of which are now untenable, and only two need be considered.
Selenium Isotopes
http://selenium.atomistry.com/isotopes.html
Selenium stable isotope number 1. Selenium stable isotope number 2. Selenium stable isotope number 3. Selenium stable isotope number 4. Selenium stable isotope number 5. Selenium stable isotope number 6. There is no Selenium Natural Radioactive isotopes known. Selenium radioactive isotope number 1. Epsilon; : 100.00 %;. 005s ≈ 50.00 ms;. Selenium radioactive isotope number 2. Epsilon; : 100.00 %;. 0033s ≈ 33.00 ms;. Selenium radioactive isotope number 3. Epsilon; : 100.00 %. Beta; -p : 0.50 %;. Beta; - :...
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Selenium Easy to Learn: Home
Selenium Easy to Learn. 22 August 2016 at 11:11. Valuable information thanks for sharing Selenium Online Training. 29 September 2016 at 13:02. Thanks for sharing this valuable information to our vision. You have posted a trust worthy blog keep sharing. Java training in chennai. Dot net training in chennai. Php training in chennai. 29 September 2016 at 15:23. For preparing bank exam and group exam , we are providing an online test model questions papers. Group Exam Questions and Answers. There are many in...
Proselem : Sélénium vitamine santé et bien être
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The Selenium Waste Website - Perma-Fix Environmental Services - Introduction
General Scientific; Occurance. Treatment and Disposal Issues. The Selenium Waste Web Site. Information on selenium, selenium waste disposal issues and related topics. Sponsored by Perma-Fix Environmental Services, Inc., www.perma-fix.com. General Scientific; Occurance. At www.encyclopedia.com. ATSDR (Agency for Toxic Substances and Disease Registry) Public Health Statment for Selenium. Good general overview of properties, sources (natural and man made) and commercial uses, as well as toxicology issues.
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Element Selenium, Se, Non Metal
Element Selenium, Se, Non Metal. Whereas the amorphous selenium does not conduct the electric current to a measurable extent, the property of conductivity is possessed by the crystalline form. Hydrogen selenide, H. Hydrogen selenide is the hydrogen acid of selenium in the same sense as hydrogen sulphide is the hydrogen acid of sulphur; its aqueous solution contains the ions Se. By heating selenium with iron filings, and to treat this with hydrochloric acid. In a manner perfectly analogous to the prep...
selenium - Blogcu.com
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Sel-Plex organic nutritional selenium>Home
Welcome to Selenium House. Distributors of quality organic selenium yeast capsules for human use. Selenium was recognised for 40 years ago to be an essential mineral in animal and human nutrition. Selenium is fundamentally important to human and animal health and a critical part of the body's defence mechanism. Selenium plays a key role in the glutathione peroxidase (GPX) enzyme system, one of the most important antioxidant systems in the body. Why do we need it? Are you Selenium deficient?
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Verwendung, Eigenschaften und Informationen zu Selen und Selenium
Der Tausendsassa unter den Halbmetallen. Zunächst aber noch einige chemische Fakten:. Im Periodensystem hat Selen die Ordnungszahl 34, das chemische Symbol ist Se. Es schmilzt bei 221 °C und siedet bei 685 °C. Auf diesen Seiten erfahren Sie mehr über das spannende Halbmetall Selen. 2012 TRADIUM GmbH, Frankfurt am Main, Germany IMPRESSUM.
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