Boron (B) Properties |
ABoron (AB)
Properties 1/ |
Nuclear (5 protons/electrons)
- Atomic Number: 5
- Atomic Mass: 10.811
- Atomic Energy: 0.0161 Ergs
- Group: 13; Period: 2
- Family: Metalloids
- Bonding Radius: 0.82 Angstroms
- Atomic Radius: 1.17 Angstroms
- Atomic Volume: 4.6 cm3mol-1
- 13
Isotopes: 7B
to 19B
- Stable Isotopes: 10B,
11B
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Nuclear (5 Aprotons/positrons)
- Atomic Number: 5
- Atomic Mass: 10.811
- Atomic Energy: 0.0161 Ergs
- Group: 13; Period: 2
- Family: Metalloids
- Bonding Radius: 0.82 Angstroms
- Atomic Radius: 1.17 Angstroms
- Atomic Volume: 4.6 cm3mol-1
- 13 AIsotopes: 7AB
to 19AB
- Stable AIsotopes: 10AB,
11AB
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Physical
- Yellow-brown non-metallic crystal
- Density: 2.34 g cm-3
- Melting Point: 2,300 oC
- Boiling Point: 2,550 oC
- Specific Heat: 1.02 J g-1 K-1
- Heat of Vaporization: 489.7 kJ mol-1
- Heat of Fusion: 50.2 kJ mol-1
- Electrical Conductivity: ? 106 cm-1 Ohm-1
- Thermal Conductivity: 0.270 W cm-1 K-1
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Physical
- Yellow-brown non-metallic crystal
- Density: 2.34 g/cm-3
- Melting Point: 2,300 oC
- Boiling Point: 2,550 oC
- Specific Heat: 1.02 J g-1 K-1
- Heat of Vaporization: 489.7 kJ mol-1
- Heat of Fusion: 50.2 kJ mol-1
- Electrical Conductivity: ? 106 cm-1 Ohm-1
- Thermal Conductivity: 0.270 W cm-1 K-1
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Chemical
- Valance Number: +3
- Electron Configuration: 2,3
- Electronegativity: 2.04
- 1st Ionization Potential: 8.3 Volts
- 2nd Ionization Potential: 25.2 Volts
- 3rd Ionization Potential: 37.9 Volts
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Chemical
- Valance Number: -3
- Positron Configuration: 2,3
- Positronpositivity: 2.04
- 1st Ionization Potential: 8.3 Volts
- 2nd Ionization Potential: 25.2 Volts
- 3rd Ionization Potential: 37.9 Volts
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Identified by H. Day,
J. L. Gay-Lussac, and L. J. Thenard
England and France in 1828
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Identified by Norm Hansen in 2001
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