 Periodic Table 
| Lithium | Symbol | Li | | Atomic Number | 3 | Relative Atomic Mass 12C = 12.0000 | 6.941 | | Atomic Radius pm | 152 | First Ionisation Energy kJ mol -1 | 513.3 | | Ionization energy (eV) | 5,3917 | | Electronegativity | 0.98 | Density kg m -3 | 534 [293 K] 515 [m.p.] | | Molar Volume cm 3 | 13.00 | Thermal Conductivity W m -1 K -1 | 84.7 [300 K] | | Melting Point K | 453.69 | | Boiling Point K | 1620 | | Number of Isotopes | 5 | | Inner + outer Shells | | | Inner + outer Orbitals | | | Filling Orbital | | Ground State Electron Configuration | | | | Ground State Electron Configuration with free Orbitals (n= 7) |  | | | Ground State Electron Configuration with compressed Orbitals (n= 0)
|  | | | | Singularity S(n=2) | | | | | | | Term Symbol | 2S 1/2 | | Discovery | Discovered by J.A. Arfvedson (Stockholm, Sweden) in 1817 and isolated by W.T. Brande in 1821 | | Name Derived From | Greek lithos meaning 'stone' |
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