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Boron

Boron. By Aubrey Hurst. Boron’s basic info. Boron is a metalloid. It’s atomic number is 5. It has 5 protons and electrons. It’s mass is 11. The symbol is B. It is in group 13 and in period 2. This is boron. This is the boron atom. Boron’s physical properties.

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Boron

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  1. Boron By Aubrey Hurst

  2. Boron’s basic info • Boron is a metalloid. • It’s atomic number is 5. • It has 5 protons and electrons. • It’s mass is 11. • The symbol is B. • It is in group 13 and in period 2.

  3. This is boron

  4. This is the boron atom

  5. Boron’s physical properties • Atomic Mass Average: 10.811 • Boiling Point: 4275K 4002°C 7236°F • Coefficient of lineal thermal expansion/K-1: 5E-6 • Conductivity • Electrical: 1.0E-12 106/cm ΩThermal: 0.274 W/cmk • Density: 2.34g/cc @ 300K • Description: • Yellow-brown non-metallic crystal. • Elastic Modulus: • Bulk: 320/GPa

  6. Boron’s chemical properties • Electrochemical Equivalent: 0.1344g/amp-hr • Electron Work Function: 4.45eV • Electronegativity: 2.04 (Pauling); 2.01 (Allrod Rochow) • Heat of Fusion: 50.2kJ/mol • Incompatibilities: • Ionization Potential • First: 8.298 • Second: 25.154 • Third: 37.93

  7. The uses • Boron is used in pyrotechnics and flares to produce a green color. • Boron has also been used in some rockets as an ignition source. • Boron-10, one of the naturally occurring isotopes of boron, is a good absorber of neutrons and is used in the control rods of nuclear reactors. • Also as a radiation shield • And as a neutron detector. • Boron filaments are used in the aerospace industry because of their high-strength and lightweight.

  8. Boron'shistory • Boron was discovered by Joseph-Louis Gay-Lussac and Louis-Jaques Thénard. • It than was refined by an English chemist by the name Humphry Davy in 1808

  9. What is boron made of • The most important boron compound is sodium borate pentahydrate (Na2B4O7·5H2O). • The second most important compound is boric acid (H3BO3), • Sodium borate decahydrate (Na2B4O7·10H2O), better known as borax, is the third most important boron compound.

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