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< Back Carbon  SEE PERIODIC TABLE   SEE FULL ARTICLE Atomic Number 6 Atomic Symbol C Atomic Weight 12.011 amu Group Non-Metal, 14 Form Solid Density @ STP 2.2 g/cm3 Melting Point 4492 °C (triple point) (8117.6 °F, 4765.2 °K) Boiling Point 3825 °C (sublimation point) (6917 °F, 4098.2 °K) Heat of Fusion 117 kJ/mol Heat of Vaporization 715 kJ/mol (sublimation) First Ionization Potential 11.26030 eV Electronegativity (on Pauling scale) 2.55 Specific Heat Capacity 0.709 J/g K Ground State Electron Configuration 2p2 Oxidation States +2, +4, -4 Stable Isotopes and Natural Abundance on Earth 12C, 98.90%; 13C, 1.10% Selected Radioisotopes 11C; 14C Atomic Radius 67 pm Crystal Structure Hexagonal

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