Symbol Tc Atomic radius: pm 135 Fusion: kJ/Mole 33.29
Name Technetium Ionic radius: pm - Boiling point: C 4265
Atomic number 43 Electron affinity 0.55 Melting point: C 2157
Atomic weight 198.00 1st  ion potential 7.28 Specific Heat Cap: J/(g K) -
Classification Trans metal Natural form Solid Thermal Cond: W/(cm K) 0.51
Configuration [Kr]4d55s2 Crystal structure Hex Electrical Cond 0.067
Oxidation states 7 Density 11 Abundance: mg/kg-crust Synthetic
Electronegativity 2.10 Vaporization: kJ/Mole 585.0    
Technetium was discovered in 1937 by Carlo Perrier. Uses - medical imaging agents, radioactive tracer