Technetium

Tc Technetium Transition Metal

 

Atomic number:  43 Atomic weight:  (97.9072)
Shells:  2,8,18,13,2 Orbitals:  [Kr] 4d5 5s2
Melting point:  2172°C Boiling point:  4877°C
Covalent radius:  1.27 Å Atomic volume:  8.5 cm³/mol
Atomic radius:  1.95 Å Ionic radius:  -- Å
Electronegativity:  1.9 Oxidation states:  (7),6,4
1st ionization pot.:  7.28 V 2nd ionization pot.:  15.26 V
3rd ionization pot.:  29.54 V Specific heat:  0.21 J/gK
Heat of fusion:  24.0 kJ/mol Heat of vapor.:  660.0 kJ/mol
Thermal conduct.:  0.506 W/cmK Electrical conduct.:  0.067 10^6/cm ohm
Density:  11.5 g/cm³ Valence:  0,2,4,5,6,7