Atomic number 6
Name Carbon
Atomic mass 12.0107(8)
Electronic configuration [He] 2s2 2p2
Electronegativity 2.55
Atomic radius 77 pm
Ion radius 16 (+4) pm
Van der Waals radius 170 pm
Ionization energy 1087 kJ/mol
Electron affinity -154 kJ/mol
Oxidation states -4, -3, -2, -1, 1, 2, 3, 4
Standard physical state solid
Bonding type covalent network
Melting point 3823 °C
Boiling point 4300 °C
Density 2.26 g/cm³
Type nonmetal
Year discovered Ancient