Element: Chromium (Cr)

Element (Atom) NameChromium 
SymbolCr
Physical state at room temperatureSolid
Element ClassificationMetal
Group NameNone
Period Number (Periodic table) 4
Group number (Periodic table)6
Atomic number24
Atomic weight51.9961 (Ref: Jlab-ele024, ciaaw-chromium, Nist-24)
52 (Ref: Lanl-24)
Atomic Radius189 pm (Van der Waals) (Ref: Lanl-24)
Density7.15 g/cm3 (Ref: Jlab-ele024)
Melting point1907°C (Ref: Jlab-ele024, Lanl-24)
Boiling point2671°C (Ref: Jlab-ele024, Lanl-24)
Electron shell configuration1s2 
2s2 2p6 
3s2 3p6 3d5 
4s1
Oxidation States+6, +3, +2 (Ref: Jlab-ele024)
6, 5, 4, 3, 2, 1, −1, −2, −4 ​(depending on the oxidation state, an acidic, basic, or amphoteric oxide) (Ref: Lanl-24)
Ionization Energy6.767 eV (Ref: Jlab-ele024)
6.76651  eV (Ref: Nist-24)
Number of Stable Isotopes3
InChIInChI=1S/Cr (Ref: Pubchem-24)
InChI KeyVYZAMTAEIAYCRO-UHFFFAOYSA-N (Ref: Pubchem-24)
Remarks 

REFERENCES

  • Jlab-ele024: https://education.jlab.org/itselemental/ele024.html
  • Lanl-24: https://periodic.lanl.gov/24.shtml
  • ciaaw-chromium : https://www.ciaaw.org/chromium.htm
  • Nist-24 : https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=24
  • Pubchem-24: https://pubchem.ncbi.nlm.nih.gov/element/24
  • science.co.il: https://www.science.co.il/elements/

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