B | Z = 5 | ◊ ◊ ◊ ◊ ◊ |
Boron | |
From the Persian "buraq" | ||||
(AM) Atomic Mass | 10.811 amu | ♦ | ![]() |
+3 |
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2550  °C | ♦ | ![]() |
2300 °C |
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2.35 g/cm3 | ♦ | ![]() |
Tetragonal |
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2 | ♦ | ![]() |
0.82  Å |
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Solid | ♦ | (C) Heat Capacity | 1.026 J/g °C |
Electronic-Config | 1s2  2s2  2p1  | ♦ | ![]() |
800.63 kJ/mol |
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480 kJ/mol | ♦ | ![]() |
50.2 kJ/mol |
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1808 | ♦ | ![]() |
England |
(E°) Standard Potential | B(OH)3 + 3 H+⇔ B + 3 H2O (-0.870 V) | |||
Stable isotopes |  10B,  11B | |||
Discovered/Synthesized by | Joseph-Louis Gay-Lussac, Louis-Jaques Thénard, Sir Humphry Davy | |||
Natural Source | The mineral/ore borax, colemanite, kernite, ulexite | |||
Common Uses | Soap, fertilizer, fibers, sports equipment, heat-resistant borosilicate glass, semiconductors | |||
Other Info | Makes glass oven proof Second hardest of the elements |
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