Boron
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A nonmetallic element occurring abundantly in borax. It isreduced with difficulty to the free state, when it can be obtained inseveral different forms; viz., as a substance of a deep olive color,in a semimetallic form, and in colorless quadratic crystals similarto the diamond in hardness and other properties. It occurs in naturealso in boracite, datolite, tourmaline, and some other minerals.Atomic weight 10.9. Symbol B.
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The chemical element of atomic number 5, a non-metallic solid.
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a hard, yellow-brown chemical element used in nuclear reactors to absorb neutrons and in various compounds that are important in manufacturing
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