Atomic Number: 14 Atomic Mass: 28.086 Atomic Radius 1.32 Å Color: Dark Steel Gray Boiling point: 2477ºC Melting point: 1410ºC Dielectric Constant: 13 Electrical Resistivity (at 20ºC): 105 microhm/cm Electronegativity: 1.90 Pauling First ionization energy: 188 kcal/mol Ignition temperature: 780ºC Oxygen Range Concentration in the atmosphere to avoid powder ignition: 8 to 13 % Minimal ignition sparking energy: 15 mJ