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B Metalloid Atomic Number: 5 Atomic Mass: Group: 2 Period: 13
B Discovered in 1824 by Jön Jakobs Berzerlius The name Boron Originated from the Arabian word Buruh, or the Pesian word buraq
Compounds Boron Triflouride (BF 3 ) Tetrafluoroborate Anion (BF 4 )
Common Uses Can be found in bleach Used in making windows that withstand thermal shock Is found in Silly Putty Is in a compound that is used in the Lockheed SR-71 Blackbird jet
Appearance Boron is a brownish black rock lump in Nature, but can be refined to a shiny metal in a lab
Where its found Boron is a natural element that is found as a solid in the earths crust
Physical Properties Melting Point: 2349 K, 2076 °C, 3769 °F Boiling Point: 4200 K, 3927 °C, 7101 °F Density: 2.08 g·cm 3 Mohs Scale: 9.5
Chemical Properties Boron is highly flammable In its amorphous form is react violent to high temperature by bursting into flames and forming oxides Though in its crystalline form it is not very reactive even at high temperatures Boric Acid on fire
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