The periodic Table
coloured by Discovery
coloured by States
Constants, Astronomy
Constants, Physics
SI Units
by Peder Axensten

Ta


in WebElements
in X-Ray info 		Ta, 73
tantalum (English)
tantale, m. (French)
Tantal, n. (German)
tantal (Russian)
tantal (Swedish)

Symbol, numberTa, 73 (metal), Group: 5; 5B
Weight180.9479
In Nature
Discovered1802, by A.G. Ekeberg (Sweden)
Density  [kg/m3]16654 [293 K] (solid)   15000 [3269 K] (liquid)   
Molar volume10.87 cm3
Melting Temperature3269 K   (2996 °C)   Enthalpy: 753.1 kJ/mol
Boiling Temperature5700 K   (5427 °C)   Enthalpy: 31.4 kJ/mol
Electrical resistance12.45E-8 [298 K] Wm
ThermalConductivity: 57.5 [300 K] W/Km     Expansion: 6.6E-6 /K
Ionisation [kJ/mol]
  M-->  M+--> M2+--> M3+--> M4+--> M5+--> M6+--> M7+--> M8+--> M9+-->M10+
Thermodynamics
State DfH° DfG° S° CpH H°298.15-H°0
[kJ/mol] [J/Kmol] [kJ/mol]
Isotopes
Mass In nature Half-life Spin m/mN NMM Decay
Ta