Element: Hafnium (Hf)

Element (Atom) NameHafnium
SymbolHf
Physical state at room temperatureSolid
Element ClassificationMetal
Group NameNone
Period Number (Periodic table) 6
Group number (Periodic table)4
Atomic number72
Atomic weight178.49 (Ref: Jlab-ele072, Nist-72)
178.5 (Ref: Lanl-72)
178.486 ± 0.006 (Ref: ciaaw-hafnium)
Atomic Radius212 pm (Van der Waals) (Ref: Lanl-72)
Density13.3 g/cm3 (Ref: Jlab-ele072)
Melting point2233°C (Ref: Jlab-ele072, Lanl-72)
Boiling point4603°C (Ref: Jlab-ele072, Lanl-72)
Electron shell configuration1s2 
2s2 2p6 
3s2 3p6 3d10 
4s2 4p6 4d10 4f14 
5s2 5p6 5d2
6s2 
Oxidation States+4 (Ref: Jlab-ele072)
4, 3, 2, 1, −2 ​(an amphoteric oxide) (Ref: Lanl-72)
Ionization Energy6.825 eV (Ref: Jlab-ele072)
6.825070 eV (Ref: Nist-72)
Number of Stable Isotopes5
InChIInChI=1S/Hf (Ref: Pubchem-72)
InChI KeyVBJZVLUMGGDVMO-UHFFFAOYSA-N (Ref: Pubchem-72)
Remarks 

REFERENCES

  • Jlab-ele072: https://education.jlab.org/itselemental/ele072.html
  • Lanl-72: https://periodic.lanl.gov/72.shtml
  • ciaaw-hafnium : https://www.ciaaw.org/hafnium.htm
  • Nist-72: https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=72
  • Pubchem-72: https://pubchem.ncbi.nlm.nih.gov/element/72
  • science.co.il: https://www.science.co.il/elements/

Was this post helpful?

Author: admin

Leave a Reply

Your email address will not be published. Required fields are marked *