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e/Allotropes of boron

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lexicalizationeng: Allotropes of boron
instance of(noun) a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder
boron, atomic number 5, B
Media
media:imgBor 1.jpg
media:imgBoron mNACTEC.jpg
media:imgGborXRD.JPG

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