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.v. My Nucleus .v.
Atomic Number: 34
Atomic Weight: 78.96
Period Number: 4
Group Number: 16
Group Name: Chalcogen
Electron Dot Model
[[ My Electrons ]]
Electron Shell Configuration
Number of Energy Levels: 4
First Energy Level: 2
Second Energy Level: 8
Third Energy Level: 18
Fourth Energy Level: 6
Selenium can be prepared with either an amorphous or crystalline structure.
The color of amorphous selenium is either red, in powder form, or black, in vitreous form.
Crystalline monoclinic selenium is a deep red
Crystalline hexagonal selenium, the most stable, is a metallic gray.
Naturally contains six stable isotopes.
Fifteen other isotopes have been characterized
~ My Home ~
Levels In Humans
I. Am. Selenium!
\\ My Compounds //
>> My Story <<DISCOVERED BY .x.
DISCOVERED AT .x. Sweden
DISCOVERED IN .x. 1817
NAME ORIGIN .x.
Greek "Selene" (moon)
.: x :.
Berzelius reported the presence of tellurium in sulphuric acid from a Swedish factory, but later resolved that the impurity was actually Selenium.
|| My Jobs ||.: production of photocells & solarcells for photographic use
:. converting a.c. electricity into d.c. & used in rectifiers
.: solid is a p-type semiconductor
.: make ruby-colored glasses & enamels
:. additive for stainless steel
Elemental selenium in different allotropic forms: black, gray, and red
(Selenium found in Brazil nuts)
Latest page update: made by Selenium
, Oct 21 2006, 11:33 PM EDT
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|Anonymous||Se4N3Br||0||Nov 21 2007, 10:13 AM EST by Anonymous|
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