Element: Tantalum (Ta)

Element (Atom) NameTantalum
SymbolTa
Physical state at room temperatureSolid
Element ClassificationMetal
Group NameNone
Period Number (Periodic table) 6
Group number (Periodic table)5
Atomic number73
Atomic weight180.94788 (Ref: Jlab-ele073, ciaaw-tantalum, Nist-73)
180.9 (Ref: Lanl-73)
Atomic Radius217 pm (Van der Waals) (Ref: Lanl-73)
Density16.4 g/cm3 (Ref: Jlab-ele073)
Melting point3017°C (Ref: Jlab-ele073, Lanl-73)
Boiling point5458°C (Ref: Jlab-ele073, Lanl-73)
Electron shell configuration1s2 
2s2 2p6 
3s2 3p6 3d10 
4s2 4p6 4d10 4f14 
5s2 5p6 5d3
6s2 
Oxidation States+5 (Ref: Jlab-ele073)
5, 4, 3, 2, 1, −1, −3 ​(a mildly acidic oxide) (Ref: Lanl-73)
Ionization Energy7.89 eV (Ref: Jlab-ele073)
7.549571 eV (Ref: Nist-73)
Number of Stable Isotopes1
InChIInChI=1S/Ta (Ref: Pubchem-73)
InChI KeyGUVRBAGPIYLISA-UHFFFAOYSA-N (Ref: Pubchem-73)
Remarks 

REFERENCES

  • Jlab-ele073: https://education.jlab.org/itselemental/ele073.html
  • Lanl-73: https://periodic.lanl.gov/73.shtml
  • ciaaw-tantalum: https://www.ciaaw.org/tantalum.htm
  • Nist-73: https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=73
  • Pubchem-73: https://pubchem.ncbi.nlm.nih.gov/element/73
  • science.co.il: https://www.science.co.il/elements/

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