Boron is a mineral that is found in food and the environment. People take boron supplements as medicine. Boron is used for boron deficiency, painful menstruation.

• Preparation Of Elemental Boron In The Laboratory

Boron is an ionic element – pure boron can exist as a mixture of positive and negative boron ions. Appearance and Characteristics Harmful effects: Elemental boron is not known to be toxic. Characteristics: Boron is a metalloid, intermediate between metals and non-metals.

It exists in many polymorphs (different crystal lattice structures), some more metallic than others. Metallic boron is extremely hard and has a very high melting point. Boron does not generally make ionic bonds, it forms stable covalent bonds. Although opaque to visible light, boron can transmit portions of infrared light.

Boron is a poor room temperature conductor of electricity but its conductivity improves markedly at higher temperatures. Uses of Boron Boron is used to dope and semiconductors, modifying their electrical properties. Boron oxide (B 2O 3) is used in glassmaking and ceramics. Borax (Na 2B 4O 7.10H 2O) is used in making fiberglass, as a cleansing fluid, a water softener, insecticide, herbicide and disinfectant. Boric acid (H 3BO 3) is used as a mild antiseptic and as a flame retardant.

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Preparation Of Elemental Boron In The Laboratory

Boron Nitride’shardness is second only to diamond, but it has better thermal and chemical stability, hence boron nitride ceramics are used in high-temperature equipment. Boron nitride nanotubes can have a similar structure to nanotubes. BN nanotubes are more thermally and chemically stable than carbon nanotubes and, unlike carbon nanotubes, boron nitride nanotubes are electrical insulators. Boron carbide (B 4C) is used in tank armor and bullet proof vests. Abundance and Isotopes Abundance earth’s crust: 10 parts per million by weight, 1 part per million by moles Abundance solar system: 2 parts per billion by weight, 0.2 parts per billion by moles Cost, pure: $1114 per 100g Cost, bulk: $500 per 100g Source: Boron compounds are usually is found in sediments and sedimentary rock formations.

The chief sources of boron are Na 2B 4O 6(OH) 2.3H 2O – known as rasorite or kernite; borax ore (known as tincal); and with in colemanite (CaB 3O 4(OH) 4.H 2O). Boron also occurs as orthoboric acid in some volcanic spring waters. Isotopes: 11 whose half-lives are known, with mass numbers 7 to 17. Naturally occurring boron is a mixture of its two stable isotopes and they are found in the percentages shown: 10B (19.9%) and 11B (80.1%). 10B is used in nuclear reactors as a neutron-capturing substance. References. Alaa S.

Abd-El-Aziz, Macromolecules Containing Metal and Metal-Like Elements Volume 8 Boron-Containing Polymers., (2007) p2. Wiley-Interscience. (pdf download 19.8 MB). Artem R. Oganov et al,., Nature 457, 863-867 (12 February 2009). Kenneth Chang,., (February 2, 2009) New York Times Online Cite this Page For online linking, please copy and paste one of the following: Boron or Boron Element Facts To cite this page in an academic document, please use the following MLA compliant citation: 'Boron.' Chemicool Periodic Table.