| Magnesium | |
| Electrons per shell | 2,8,2 |
| Electron Configuration | [Ne] 3s2 ![]() |
| Ground state | 1S0 |
| Atomic Volume | 13.97 cm3 mol-1 |
| Electronegativity | 1.31 |
| Magnetic ordering | Paramagnetic |
| Mass magnetic susceptibility | 6.9 x 10-9 |
| Molar magnetic susceptibility | 1.68 x 10-10 |
| Speed of sound | 4940 m s-1 |
Thermal Properties |
|
| Enthalpy of Atomization | 148.5 kJ mol-1 @25°C |
| Enthalpy of Fusion | 9.04 kJ mol-1 |
| Enthalpy of Vaporisation | 127.6 kJ mol-1 |
| Heat Capacity | 24.869 J mol-1 K-1 |
| Thermal Conductivity | 156 W m-1 K-1 |
| Thermal Expansion | 24.8 μm m-1 K-1 |
| Critcal Temperature | No data. |
| Critcal Pressure | No data. |
| Adiabatic index | No data. |
Hardness |
|
| Brinell hardness | 260 MPa |
| Mohs hardness | 2.5 |
Elastic Properties |
|
| Bulk modulus | 45 GPa |
| Poisson ratio | 0.29 |
| Shear modulus | 17 GPa |
| Young's modulus | 45 GPa |
Electrical Properties |
|
| Electrical resistivity | 4.4 x 10-7 Ω m |
| Electrical conductivity | 0.226 106/cm Ω |
Chemical Properties |
|
| Electrochemical Equivalent | 0.45341 g Ah-1 |
| Electron Work Function | 3.66 eV |
| Valence Electron Potential (-eV) | 40 |
| Ionization Potential | |
| 7.646 | |
| 15.035 | |
| 80.143 | |
Flammability |
|
| 473°C | |
| 634°C (cc) | |
Energy Levels |
|
| 1.2536 KeV | |
| 1.2536 KeV | |
| 1.3022 KeV | |
Atomic Radii |
|
| 150 pm | |
| 145 pm | |
| 130 pm | |
| 173 pm | |
| 127 pm | |
| 160 pm | |
Ionic Radii (Å) |
||||
| Charge | Coordination | Crystal | Ionic | Key |
| 2 | IV | 0.71 | 0.57 | |
| V | 0.8 | 0.66 | ||
| VI | 0.86 | 0.72 | * | |
| VIII | 1.03 | 0.89 | C | |
| R, From r3 vs V plots. |
| C, Calculated from bond length - bond strength equations. |
| E, Estimated. |
| *, Most Reliable. |
| M, From Metallic Oxides. |
| A, Ahrens (1952) Ionic radius. |
| P, Pauling's (1960) Crystal Radius. |
Oxidation States |
|
| Mg+2 | |
Ionisation Energies (kJ mol-1) ![]() |
|
| 737.7 | |
| 1450.7 | |
| 7732.6 | |
| 10540 | |
| 13630 | |
| 17995 | |
| 21703 | |
| 25656 | |
| 31642 | |
| 35461 | |
Vapour Pressure |
||||||
| P (Pa) | 1 | 10 | 100 | 1K | 10K | 100K |
| T (K) | 701 | 773 | 861 | 971 | 1132 | 1361 |
Crystal Structure |
|
| Hexagonal close packed | |
![]() |
a = 320.94 pm |
| b = 320.94 pm | |
| c = 521.08 pm | |
| α = 90° | |
| β = 90° | |
| γ = 120° | |