Element: Lithium (Li)

Element NameLithium
Physical state at room temperatureSolid
Element ClassificationMetal
Group NameAlkali Metal
Group number (Periodic table)1
Period Number (Periodic table) 2
Atomic number3
Atomic Weight6.941 (Ref: jlab-ele003)
6.94 (Ref: lanl-3)
[6.938, 6.997] (Ref: Ciaaw-lithium, nist-element3)
Atomic Radius182 pm (Van der Waals) (Ref: lanl-3)
Density0.53 (g/cm3) (Ref: lanl-3)
0.534 (g/cm3) (jlab-ele003)
Melting point180.5 °C (Ref: lanl-3, jlab-ele003)
Boiling point1330 °C (Ref: lanl-3)
1342 °C (Ref)
Electron configuration[He] 2s1 (Ref: lanl-3)
Oxidation States+1 ​(a strongly basic oxide) (Ref: lanl-3)
Ionization Energy5.392 eV (jlab-ele003)
Number of Stable Isotopes2 (jlab-ele003)


  • Jlab-ele003: https://education.jlab.org/itselemental/ele003.html 
  • Lanl-3: https://periodic.lanl.gov/3.shtml 
  • Ciaaw-lithium: https://www.ciaaw.org/lithium.htm 
  • Nist-element3: https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=3
  • Pubchem-Lithium: https://pubchem.ncbi.nlm.nih.gov/element/Lithium

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