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Germanium is a chemical element; it has symbol Ge and atomic number 32. It is lustrous, hard-brittle, grayish-white and similar in appearance to silicon. It is a metalloid or a nonmetal in the carbon group that is chemically similar to silicon. Like silicon, germanium naturally reacts and forms complexes with oxygen in nature.
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Germanium (32 Ge) has five naturally occurring isotopes, 70 Ge, 72 Ge, 73 Ge, 74 Ge, and 76 Ge. Of these, 76 Ge is very slightly radioactive, decaying by double beta decay with a half-life of 1.78 × 10 21 years [4] (130 billion times the age of the universe). Stable 74 Ge is the most common isotope, having a natural abundance of approximately 36%.
Bismuth germanium oxide or bismuth germanate is an inorganic chemical compound of bismuth, germanium and oxygen. Most commonly the term refers to the compound with chemical formula Bi 4 Ge 3 O 12 ( BGO ), with the cubic evlitine crystal structure , used as a scintillator .
The kits are manufactured in China, and Ng supervises distribution out of a 7,500 square feet (700 m 2) warehouse near his home. [1] In 2013, Ng worked with The Beadery and Toner Plastics to produce the Wonder Loom, a redesigned version of the Rainbow Loom that is made in the United States. The Wonder Loom is sold by Walmart. [8]
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