Symbol Ta Atomic radius: pm 143 Fusion: kJ/Mole 36.57
Name Tantalum Ionic radius: pm (+5)64 Boiling point: C 5458
Atomic number 73 Electron affinity 0.32 Melting point: C 3017
Atomic weight 180.9 1st  ion potential 7.89 Specific Heat Cap: J/(g K) 0.14
Classification Trans metal Natural form Solid Thermal Cond: W/(cm K) 0.58
Configuration [Xe]4f145d36s2 Crystal structure BCC Electrical Cond 0.0761
Oxidation states 5 Density 16.4 Abundance: mg/kg-crust 2
Electronegativity 1.5 Vaporization: kJ/Mole 753.1    
Tantalum was discovered in 1802 by Anders Gustaf Ekeberg. Uses - surgical implants, heat exchange, capacitors, camera lenses, first metal wire used in light bulbs