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allotropic material

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  • nitrogen group element — ▪ chemical elements Introduction  any of the chemical elements that constitute Group Va of the periodic table (see Figure >). The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi). The elements share… …   Universalium

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  • Iron — Fe redirects here. For other uses, see Fe (disambiguation). This article is about the chemical element. For other uses, see Iron (disambiguation). manganese …   Wikipedia

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  • Amorphous silicon — (a Si) is the non crystalline allotropic form of silicon. Silicon is a four fold coordinated atom that is normally tetrahedrally bonded to four neighboring silicon atoms. In crystalline silicon this tetrahedral structure is continued over a large …   Wikipedia

  • Nitrogen — carbon ← nitrogen → oxygen ↑ N ↓ P …   Wikipedia

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