बोरॉन तत्व के बारे में जानकारी (Information about boron element)
Boron
• 1.st ionization energy [eV] → 8.298
• 2.nd ionization energy [eV] → 25.154
• 3.rd ionization energy [eV] → 37.93
• Atomic number → 5
• Atomic radius [pm] → 87
• Boiling point [°C] → 2550
• Covalent radius [pm] → 82
• Density [g/cm3] → 2.34
• Discovery → 1808
• Electrical conductivity [S m-1] → 5.10*-6
• Electron configuration → 1s2 2s2 2p1
• Electronegativity → 2
• Element category → Metalloids
• Group → III.A
• Hardness [Mohs scale] → 9.3
• Heat capacity [J K-1g-1] → 1.026
• Latin name → Borum
• Melting point [°C] → 2300
• Oxidation numbers → 3
• Period → 2
• Relative atomic mass → 10.811
• Stable isotopes → 2
• State → Solid
• Symbol → B
• Thermal conductivity [W m-1K-1] → 27
• Unstable isotopes → 4
• Vickers hardness [MPa] → 4.9 · 10*4
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