Periodic Table 
| Magnesium Truss Element | Symbol | Mg | | Atomic Number | 12 | Relative Atomic Mass 12C = 12.0000 | 24.3050 | | Atomic Radius pm | 160 | First Ionisation Energy kJ mol -1 | 737.7 | | Ionisation Energy (eV) | 7,6462 | | Electronegativity | 1.31 | Density kg m -3 | 1738 [293 K] 1585 [l., m.p.] | | Molar Volume cm 3 | 13.98 | Thermal Conductivity W m -1 K -1 | 156 [300 K] | | Melting Point K | 922.0 | | Boiling Point K | 1363 | | Number of Isotopes | 12 | | Inner + outer Shells | | | Inner + outer Orbitals | | | Filling Orbital | | Ground State Electron Configuration | | | Ground State Electron C onfiguration with free Orbitals (n= 6) |  | | Ground State Electron Configuration with compressed Orbitals (n=10) |  | | | Singularity | | | | | s | p | d | f | g | h | i | j | 1 | 2 | | | | | | | | 2 | 2 | 6 | | | | | | | 3 | 2 | 6 | 10 | | | | | | 4 | | | | | | | | | 5 | | | | | | | | | 6 | | | | | | | | | 7 | | | | | | | | | 8 | | | | | | | | |
| | | Term Symbol | 1S 0 | | Discovery | Discovered by J. Black (Edinburgh, Scotland) in 1755 and isolated by Sir. H. Davey in 1808 | | Name Derived From | Greek Megnesia meaning 'district of Thessaly' |
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