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Selenium is found in metal sulfide ores, where it substitutes for sulfur. Commercially, selenium is produced as a byproduct in the refining of these ores. Minerals that are pure selenide or selenate compounds are rare. The chief commercial uses for selenium today are glassmaking and pigments. Selenium is a semiconductor and is used in photocells.
On July 6, 2011, Sherwin-Williams acquired Leighs Paints, based in Bolton UK, manufacturers of intumescent and high performance industrial coatings. [22] On June 4, 2012, Sherwin-Williams acquired Geocel Holdings Corp for an undisclosed amount. [23] Sherwin-Williams acquired the Valspar Corporation on March 20, 2016, for $11.3 billion. [24]
A diatomic molecular orbital diagram is used to understand the bonding of a diatomic molecule. MO diagrams can be used to deduce magnetic properties of a molecule and how they change with ionization. They also give insight to the bond order of the molecule, how many bonds are shared between the two atoms. [12]
The orbital wave functions are positive in the red regions and negative in the blue. The right column shows virtual MO's which are empty in the ground state, but may be occupied in excited states. In chemistry, a molecular orbital (/ ɒr b ə d l /) is a mathematical function describing the location and wave-like behavior of an electron in a ...
A variety of colors, often similar to the colors found in a flame test, are produced in a bead test, which is a qualitative test for determining metals. A platinum loop is moistened and dipped in a fine powder of the substance in question and borax. The loop with the adhered powders is then heated in a flame until it fuses and the color of the ...
This is in line with Madelung's rule, as the 4s-orbital has n + l = 4 (n = 4, l = 0) while the 3d-orbital has n + l = 5 (n = 3, l = 2). After calcium, most neutral atoms in the first series of transition metals ( scandium through zinc ) have configurations with two 4s electrons, but there are two exceptions.
Selenium is a soft (MH 2.0) and brittle semi-metallic element. It is commonly regarded as a nonmetal, but is sometimes considered a metalloid or even a heavy metal . Selenium has a hexagonal polyatomic (CN 2) crystalline structure.
Akzo Nobel N.V., stylised as AkzoNobel, is a Dutch multinational company which creates paints and performance coatings for both industry and consumers worldwide. . Headquartered in Amsterdam, the company has activities in more than 150