Element: Terbium (Tb)

Element (Atom) NameTerbium
SymbolTb
Physical state at room temperatureSolid
Element ClassificationMetal
Group NameLanthanide
Period Number (Periodic table) 6
Group number (Periodic table)None
Atomic number65
Atomic weight158.92535 (Ref: Jlab-ele065, Nist-65)
158.925354 (Ref: ciaaw-terbium)
158.9 (Ref: Lanl-65)
Atomic Radius221 pm (Van der Waals) (Ref: Lanl-65)
Density8.23 g/cm3 (Ref: Jlab-ele065)
Melting point1356°C (Ref: Jlab-ele065, Lanl-65)
Boiling point3230°C (Ref: Jlab-ele065)
3123 °C (Ref: Lanl-65)
Electron shell configuration1s2 
2s2 2p6 
3s2 3p6 3d10 
4s2 4p6 4d10 4f9 
5s2 5p6 
6s2 
Oxidation States+3 (Ref: Jlab-ele065)
4, 3, 2, 1 ​(a weakly basic oxide) (Ref: Lanl-65)
Ionization Energy5.864 eV (Ref: Jlab-ele065)
5.8638 eV (Ref: Nist-65)
Number of Stable Isotopes1
InChIInChI=1S/Tb (Ref: Pubchem-65)
InChI KeyGZCRRIHWUXGPOV-UHFFFAOYSA-N (Ref: Pubchem-65)
Remarks 

REFERENCES

  • Jlab-ele065: https://education.jlab.org/itselemental/ele065.html
  • Lanl-65: https://periodic.lanl.gov/65.shtml
  • ciaaw-terbium : https://www.ciaaw.org/terbium.htm
  • Nist-65: https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=65
  • Pubchem-65: https://pubchem.ncbi.nlm.nih.gov/element/65
  • science.co.il: https://www.science.co.il/elements/

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