Element: Iron (Fe)

Element (Atom) NameIron
SymbolFe
Physical state at room temperatureSolid
Element ClassificationMetal
Group NameNone
Period Number (Periodic table) 4
Group number (Periodic table)8
Atomic number26
Atomic weight55.845 (Ref: Jlab-ele026, Ciaaw-iron, Nist-26)
55.85 (Ref: Lanl-26)
Atomic Radius194 pm (Van der Waals) (Ref: Lanl-26)
Density7.874 g/ml (Ref: Jlab-ele026)
Melting point1538°C (Ref: Jlab-ele026)
Boiling point2861°C (Ref: Jlab-ele026, Lanl-26)
2862 °C (Ref: Lanl-26)
Electron shell configuration1s2 
2s2 2p6 
3s2 3p6 3d6 
4s2
Oxidation States+3, +2 (Ref: Jlab-ele026)
−4, −2, −1, +1, +2, +3, +4, +5,[ +6, +7 ​(an amphoteric oxide) (Ref: Lanl-26)
Ionization Energy7.902 eV (Ref: Jlab-ele026)
7.9024681  eV (Ref: Nist-26)
Number of Stable Isotopes4
InChIInChI=1S/Fe (Ref: Pubchem-26)
InChI KeyXEEYBQQBJWHFJM-UHFFFAOYSA-N (Ref: Pubchem-26)
Remarks 

REFERENCES

  • Jlab-ele026: https://education.jlab.org/itselemental/ele026.html
  • Lanl-26: https://periodic.lanl.gov/26.shtml
  • Ciaaw-iron : https://www.ciaaw.org/iron.htm
  • Nist-26 : https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=26
  • Pubchem-26: https://pubchem.ncbi.nlm.nih.gov/element/26
  • science.co.il: https://www.science.co.il/elements/

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