C

 

Carbon

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Atomic number 6
Atomic weight 12.011
Orbital electronic configuration (He)2s22p2
First ionization energy (eV) 11.260
Second ionization energy (eV) 24.376
Third ionization energy (eV) 47.871
Electronegativity (Pauling) 2.55
Atomic radius (Å) 0.91
Bonding radius (Å) 0.77
Oxidation states ±4, 2

Properties

Density (g/ml) 2.62
Melting point (K) 4100
Boiling point (K) 4470
Heat of vaporization (kJ/mol) 355.80
Heat of fusion (kJ/mol) 7.322
Specific heat capacity (Jg-1K-1) 0.71
Crystal structure hexagonal

Periodic Table