Atomic Number | 12 |
---|---|
Atomic Weight | 24.305 |
Mass Number | 24 |
Group | 2 |
---|---|
Period | 3 |
Block | s |
Protons | 12 p+ |
---|---|
Neutrons | 12 n0 |
Electrons | 12 e- |
Atomic Radius | |
---|---|
Molar Volume | |
Covalent Radius | |
Metallic Radius | |
Ionic Radius | |
Crystal Radius | |
Van der Waals Radius | |
Density |
Energy | |
---|---|
Proton Affinity | |
Electron Affinity | |
Ionization Energy | |
Heat of Vaporization | |
Heat of Fusion | |
Heat of Formation | |
Electrons | |
Electron Shells | 2, 8, 2 |
Valence Electrons | 2 ⓘ |
Electron Configuration | [Ne] 3s2ⓘ 1s2 2s2 2p6 3s2 |
Oxidation States | 0, 1, 2 |
Electronegativity | 1.31
|
Electrophilicity Index | |
States of Matter | |
Phase | Solid |
Gas Phase | |
Boiling Point | |
Melting Point | |
Critical Pressure | |
Critical Temperature | |
Triple Point | |
Visual | |
Magnesium is a Silver. Mg has a CPK of #228b22, Jmol of #8aff00, and MOLCAS GV of #8aff00. The Appearance of Element 12 is shiny grey solid. | |
Color | Silver
|
Appearance | shiny grey solid |
Refractive Index | |
Thermodynamic Properties | |
Thermal Conductivity | |
Thermal Expansion | |
Molar Heat Capacity | |
Specific Heat Capacity | |
Heat Capacity Ratio (Adiabatic Index) | |
Electrical Properties | |
Type | Conductor |
Electrical Conductivity | |
Electrical Resistivity | |
Superconducting Point | |
Magnetism | |
Type | paramagnetic |
Magnetic Susceptibility (Mass) | 0.0000000069 m³/Kg
|
Magnetic Susceptibility (Molar) | 0.000000000168 m³/mol
|
Magnetic Susceptibility (Volume) | 0.000012
|
Magnetic Ordering | |
Curie Point | |
Neel Point | |
Structure | |
The Crystal Structure of Magnesium is HEX. The lattice constant of Mg is 3.21 Å. The lattice angles of Element 12 are π/2, π/2, 2 π/3. | |
Crystal Structure | Simple Hexagonal (HEX) |
Lattice Constant | |
Lattice Angles | π/2, π/2, 2 π/3 |
Mechanical Properties | |
Magnesium has a Brinell of 260 MPa, and Mohs hardness of 2.5 MPa. The Bulk Modulus of Mg is 45 GPa. The Shear Modulus of Element 12 is 17 GPa. The Young Modulus of Magnesium (Mg) is 45 GPa. The Poisson Ratio of Magnesium is 0.29. The Speed of Sound of Mg is 4602 m/s. | |
Hardness | |
Bulk Modulus | |
Shear Modulus | |
Young's Modulus | |
Poisson Ratio | 0.29
|
Speed of Sound | |
Classification | |
The CAS Group of Magnesium is IIA. The IUPAC Group of Mg is IIA. The Glawe Number of Element 12 is 73. The Mendeleev Number of Magnesium (Mg) is 76. The Pettifor Number of Magnesium is 73. The Geochemical Class of Mg is major. The Goldschmidt Class of Element 12 is litophile. | |
Category | Alkaline earth metals, Alkaline earth metals |
CAS Group | IIA |
IUPAC Group | IIA |
Glawe Number | 73 |
Mendeleev Number | 76 |
Pettifor Number | 73 |
Geochemical Class | major |
Goldschmidt Class | litophile |
The Gas Basicity of Magnesium is 797.3 kJ/mol. The Dipole Polarizability of Mg is 71.2 plus or minus 0.4 a₀. Element 12 has a C6 Dispersion Coefficient (CD) of 626 a₀, and C6 Dispersion Coefficient (GB) of 629 a₀. The Allotropes of Magnesium (Mg) is . The Neutron Cross Section of Magnesium is 0.063. The Neutron Mass Absorption of Mg is 0.0001. The Quantum Numbers of Element 12 is 1S0. The Space Group of Magnesium (Mg) is 194 (P63/mmc).
Gas Basicity | |
---|---|
Dipole Polarizability | |
C6 Dispersion Coefficient | |
Allotropes | |
Neutron Cross Section | 0.063
|
Neutron Mass Absorption | 0.0001
|
Quantum Numbers | 1S0 |
Space Group | 194 (P63/mmc) |
Stable Isotopes | 3 |
---|---|
Unstable Isotopes | 20 |
Natural Isotopes | 3 |
Mass Number | 19 |
---|---|
Neutron Number | 7 |
Relative Atomic Mass | |
G-Factor | |
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | 5 ± 3 ps
|
Spin | 1/2 |
Quadrupole Moment | 0
|
Discovery Year | 2007 |
Parity | - |
Decay Mode | Intensity |
---|---|
2p (2-proton emission) | 100% |
Mass Number | 20 |
---|---|
Neutron Number | 8 |
Relative Atomic Mass | |
G-Factor | 0
|
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | 90.4 ± 0.5 ms
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1974 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
β+ p (β+-delayed proton emission) | 30.3% |
Mass Number | 21 |
---|---|
Neutron Number | 9 |
Relative Atomic Mass | |
G-Factor | -0.3932 ± 0.0028
|
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | 120 ± 0.4 ms
|
Spin | 5/2 |
Quadrupole Moment | |
Discovery Year | 1963 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
β+ p (β+-delayed proton emission) | 20.1% |
β+α (β+-delayed α emission) | 0.116% |
B+pA | 0.016% |
Mass Number | 22 |
---|---|
Neutron Number | 10 |
Relative Atomic Mass | |
G-Factor | 0
|
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | 3.8745 ± 0.0007 s
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1961 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
Mass Number | 23 |
---|---|
Neutron Number | 11 |
Relative Atomic Mass | |
G-Factor | -0.35753333333333 ± 0.0002
|
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | 11.3039 ± 0.0032 s
|
Spin | 3/2 |
Quadrupole Moment | 0.114 ± 0.003
|
Discovery Year | 1939 |
Parity | + |
Decay Mode | Intensity |
---|---|
β+ (β+ decay; β+ = ϵ + e+) | 100% |
Mass Number | 24 |
---|---|
Neutron Number | 12 |
Relative Atomic Mass | |
G-Factor | 0
|
Abundance | 78.965 ± 0.049
|
Radioactivity | Stable |
Half Life | Not Radioactive ☢️ |
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1920 |
Parity | + |
Mass Number | 25 |
---|---|
Neutron Number | 13 |
Relative Atomic Mass | |
G-Factor | -0.342132 ± 0.000012
|
Abundance | 10.011 ± 0.013
|
Radioactivity | Stable |
Half Life | Not Radioactive ☢️ |
Spin | 5/2 |
Quadrupole Moment | 0.199 ± 0.002
|
Discovery Year | 1920 |
Parity | + |
Mass Number | 26 |
---|---|
Neutron Number | 14 |
Relative Atomic Mass | |
G-Factor | 0
|
Abundance | 11.025 ± 0.038
|
Radioactivity | Stable |
Half Life | Not Radioactive ☢️ |
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1920 |
Parity | + |
Mass Number | 27 |
---|---|
Neutron Number | 15 |
Relative Atomic Mass | |
G-Factor | -0.8212 ± 0.003
|
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | 9.435 ± 0.027 m
|
Spin | 1/2 |
Quadrupole Moment | 0
|
Discovery Year | 1934 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Mass Number | 28 |
---|---|
Neutron Number | 16 |
Relative Atomic Mass | |
G-Factor | 0
|
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | 20.915 ± 0.009 h
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1953 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Mass Number | 29 |
---|---|
Neutron Number | 17 |
Relative Atomic Mass | |
G-Factor | |
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | 1.3 ± 0.12 s
|
Spin | 3/2 |
Quadrupole Moment | -0.16 ± 0.04
|
Discovery Year | 1971 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
Mass Number | 30 |
---|---|
Neutron Number | 18 |
Relative Atomic Mass | |
G-Factor | 0
|
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | 317 ± 4 ms
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1971 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 0.06% |
Mass Number | 31 |
---|---|
Neutron Number | 19 |
Relative Atomic Mass | |
G-Factor | |
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | 270 ± 2 ms
|
Spin | 1/2 |
Quadrupole Moment | 0
|
Discovery Year | 1977 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 6.2% |
Mass Number | 32 |
---|---|
Neutron Number | 20 |
Relative Atomic Mass | |
G-Factor | 0
|
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | 80.4 ± 0.4 ms
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1977 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 5.5% |
Mass Number | 33 |
---|---|
Neutron Number | 21 |
Relative Atomic Mass | |
G-Factor | |
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | 92 ± 1.2 ms
|
Spin | 3/2 |
Quadrupole Moment | 0.13 ± 0.09
|
Discovery Year | 1979 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 14% |
2n (2-neutron emission) |
Mass Number | 34 |
---|---|
Neutron Number | 22 |
Relative Atomic Mass | |
G-Factor | 0
|
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | 44.9 ± 0.4 ms
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1979 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 21% |
2n (2-neutron emission) | 0.1% |
Mass Number | 35 |
---|---|
Neutron Number | 23 |
Relative Atomic Mass | |
G-Factor | |
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | 11.3 ± 0.6 ms
|
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | 1989 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 52% |
2n (2-neutron emission) |
Mass Number | 36 |
---|---|
Neutron Number | 24 |
Relative Atomic Mass | |
G-Factor | 0
|
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | 3.9 ± 1.3 ms
|
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1989 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | 48% |
2n (2-neutron emission) |
Mass Number | 37 |
---|---|
Neutron Number | 25 |
Relative Atomic Mass | |
G-Factor | |
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | 8 ± 4 ms
|
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | 1996 |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | |
β− n (β−-delayed neutron emission) | |
2n (2-neutron emission) |
Mass Number | 38 |
---|---|
Neutron Number | 26 |
Relative Atomic Mass | |
G-Factor | 0
|
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | |
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 1997 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | 100% |
β− n (β−-delayed neutron emission) | |
2n (2-neutron emission) |
Mass Number | 39 |
---|---|
Neutron Number | 27 |
Relative Atomic Mass | |
G-Factor | |
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | |
Spin | 7/2 |
Quadrupole Moment | |
Discovery Year | |
Parity | - |
Decay Mode | Intensity |
---|---|
n (neutron emission) | |
β− (β− decay) |
Mass Number | 40 |
---|---|
Neutron Number | 28 |
Relative Atomic Mass | |
G-Factor | 0
|
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | |
Spin | 0 |
Quadrupole Moment | 0
|
Discovery Year | 2007 |
Parity | + |
Decay Mode | Intensity |
---|---|
β− (β− decay) | |
β− n (β−-delayed neutron emission) | |
2n (2-neutron emission) |
Mass Number | 41 |
---|---|
Neutron Number | 29 |
Relative Atomic Mass | |
G-Factor | |
Abundance | |
Radioactivity | ☢️ Radioactive |
Half Life | |
Spin | 3/2 |
Quadrupole Moment | |
Discovery Year | |
Parity | - |
Decay Mode | Intensity |
---|---|
β− (β− decay) | |
β− n (β−-delayed neutron emission) |
Scottish chemist Joseph Black recognized magnesium as an element in 1755. Magnesium was first isolated by Sir Humphry Davy in 1808, in London. He used electrolysis on a mixture of magnesia and mercuric oxide. Antoine Bussy prepared it in coherent form in 1831. From Magnesia, district in Thessaly
Discoverers | Sir Humphrey Davy |
---|---|
Discovery Location | England |
Discovery Year | 1808 |
Etymology (Name Origin) | From Magnesia ancient city in district of Thessaly, Greece. |
Pronunciation | mag-NEE-zih-em (English) |
Usually obtained by electrolysis of melted magnesium chloride (MgCl2) found in sea water. Each cubic mile of seawater contains about 12 billion pounds of magnesium.
Abundance | |
---|---|
Abundance in Earth's crust | |
Natural Abundance (Oceans) | |
Natural Abundance (Human Body) | 0.027 %
|
Natural Abundance (Meteor) | 12 %
|
Natural Abundance (Sun) | 0.07 %
|
Abundance in Universe | 0.06 %
|
1 | s | 0.3911 |
2 | p | 4.1742 |
2 | s | 4.608 |
3 | s | 8.6925 |