Periodic Table Element Comparison: Compare Elements - Magnesium vs Osmium
Compare Magnesium and Osmium
Compare Magnesium and Osmium on the basis of their properties, attributes and periodic table facts. Compare elements on more than 90 properties. All the elements of similar categories show a lot of similarities and differences in their chemical, atomic, physical properties and uses. These similarities and dissimilarities should be known while we study periodic table elements. You can study the detailed comparison between Magnesium vs Osmium with most reliable information about their properties, attributes, facts, uses etc. You can compare Mg vs Os on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more.
Facts
| Name | Magnesium | Osmium |
| Atomic Number | 12 | 76 |
| Atomic Symbol | Mg | Os |
| Atomic Weight | 24.305 | 190.23 |
| Phase at STP | Solid | Solid |
| Color | Silver | SlateGray |
| Metallic Classification | Alkaline Earth Metal | Transition Metal |
| Group in Periodic Table | group 2 | group 8 |
| Group Name | beryllium family | iron family |
| Period in Periodic Table | period 3 | period 6 |
| Block in Periodic Table | s -block | d -block |
| Electronic Configuration | [Ne] 3s2 | [Xe] 4f14 5d6 6s2 |
| Electronic Shell Structure (Electrons per shell) | 2, 8, 2 | 2, 8, 18, 32, 14, 2 |
| Melting Point | 923 K | 3306 K |
| Boiling Point | 1363 K | 5285 K |
| CAS Number | CAS7439-95-4 | CAS7440-04-2 |
| Neighborhood Elements | Neighborhood Elements of Magnesium | Neighborhood Elements of Osmium |
History
| History | The element Magnesium was discovered by J. Black in year 1755 in United Kingdom. Magnesium derived its name from Magnesia, a district of Eastern Thessaly in Greece. | The element Osmium was discovered by S. Tennant in year 1803 in United Kingdom. Osmium derived its name from the Greek osmè, meaning 'smell'. |
| Discovery | J. Black (1755) | S. Tennant (1803) |
| Isolated | H. Davy (1808) | S. Tennant (1803) |
Presence: Abundance in Nature and Around Us
Parts per billion (ppb) by weight / by atoms (1ppb =10^-7 %)
| Abundance in Universe | 600000 / 30000 | 3 / 0.02 |
| Abundance in Sun | 700000 / 30000 | 2 / 0.02 |
| Abundance in Meteorites | 120000000 / 100000000 | 670 / 70 |
| Abundance in Earth's Crust | 29000000 / 25000000 | 1.8 / 0.2 |
| Abundance in Oceans | 1326000 / 337000 | - / - |
| Abundance in Humans | 270000 / 70000 | - / - |
Crystal Structure and Atomic Structure
| Atomic Volume | 13.984 cm3/mol | 8.421 cm3/mol |
| Atomic Radius | 145 pm | 185 pm |
| Covalent Radius | 130 pm | 128 pm |
| Van der Waals Radius | 173 pm | - |
| Atomic Spectrum |  |  |
| Lattice Constant | 320.94, 320.94, 521.08 pm | 273.44, 273.44, 431.73 pm |
| Lattice Angle | π/2, π/2, 2 π/3 | π/2, π/2, 2 π/3 |
| Space Group Name | P63/mmc | P63/mmc |
| Space Group Number | 194 | 194 |
| Crystal Structure | Simple Hexagonal  | Simple Hexagonal |
Atomic and Orbital Properties
| Atomic Number | 12 | 76 |
| Number of Electrons (with no charge) | 12 | 76 |
| Number of Protons | 12 | 76 |
| Mass Number | 24.305 | 190.23 |
| Number of Neutrons | 12 | 114 |
| Shell structure (Electrons per energy level) | 2, 8, 2 | 2, 8, 18, 32, 14, 2 |
| Electron Configuration | [Ne] 3s2 | [Xe] 4f14 5d6 6s2 |
| Valence Electrons | 3s2 | 5d6 6s2 |
| Oxidation State | 2 | 4 |
| Atomic Term Symbol (Quantum Numbers) | 1S0 | 5D4 |
| Shell structure |  |  |
Isotopes and Nuclear Properties
Magnesium has 3 stable naturally occuring isotopes while Osmium has 6 stable naturally occuring isotopes.
| Known Isotopes | 19Mg, 20Mg, 21Mg, 22Mg, 23Mg, 24Mg, 25Mg, 26Mg, 27Mg, 28Mg, 29Mg, 30Mg, 31Mg, 32Mg, 33Mg, 34Mg, 35Mg, 36Mg, 37Mg, 38Mg, 39Mg, 40Mg | 162Os, 163Os, 164Os, 165Os, 166Os, 167Os, 168Os, 169Os, 170Os, 171Os, 172Os, 173Os, 174Os, 175Os, 176Os, 177Os, 178Os, 179Os, 180Os, 181Os, 182Os, 183Os, 184Os, 185Os, 186Os, 187Os, 188Os, 189Os, 190Os, 191Os, 192Os, 193Os, 194Os, 195Os, 196Os |
| Stable Isotopes | Naturally occurring stable isotopes: 24Mg, 25Mg, 26Mg | Naturally occurring stable isotopes: 184Os, 187Os, 188Os, 189Os, 190Os, 192Os |
| Neutron Cross Section | 0.063 | 15 |
| Neutron Mass Absorption | 0.0001 | 0.0023 |
Chemical Properties: Ionization Energies and electron affinity
| Valence or Valency | 2 | 6 |
| Electronegativity | 1.31 Pauling Scale | 2.2 Pauling Scale |
| Electron Affinity | 0 kJ/mol | 106.1 kJ/mol |
| Ionization Energies | 1st: 737.7 kJ/mol 2nd: 1450.7 kJ/mol 3rd: 7732.7 kJ/mol 4th: 10542.5 kJ/mol 5th: 13630 kJ/mol 6th: 18020 kJ/mol 7th: 21711 kJ/mol 8th: 25661 kJ/mol 9th: 31653 kJ/mol 10th: 35458 kJ/mol 11th: 169988 kJ/mol 12th: 189368 kJ/mol | 1st: 840 kJ/mol 2nd: 1600 kJ/mol |
Physical Properties
| Density | 1.738 g/cm3 | 22.59 g/cm3 |
| Molar Volume | 13.984 cm3/mol | 8.421 cm3/mol |
Elastic Properties | ||
| Young Modulus | 45 | - |
| Shear Modulus | 17 GPa | 222 GPa |
| Bulk Modulus | 45 GPa | - |
| Poisson Ratio | 0.29 | 0.25 |
Hardness - Tests to Measure of Hardness of Element | ||
| Mohs Hardness | 2.5 MPa | 7 MPa |
| Vickers Hardness | - | - |
| Brinell Hardness | 260 MPa | 3920 MPa |
Electrical Properties | ||
| Electrical Conductivity | 23000000 S/m | 12000000 S/m |
| Resistivity | 4.4e-8 m Ω | 8.1e-8 m Ω |
| Superconducting Point | - | 0.66 |
Heat and Conduction Properties | ||
| Thermal Conductivity | 160 W/(m K) | 88 W/(m K) |
| Thermal Expansion | 0.0000082 /K | 0.0000051 /K |
Magnetic Properties | ||
| Magnetic Type | Paramagnetic | Paramagnetic |
| Curie Point | - | - |
| Mass Magnetic Susceptibility | 6.9e-9 m3/kg | 6e-10 m3/kg |
| Molar Magnetic Susceptibility | 1.68e-10 m3/mol | 1.1e-10 m3/mol |
| Volume Magnetic Susceptibility | 0.000012 | 0.000014 |
Optical Properties | ||
| Refractive Index | - | - |
Acoustic Properties | ||
| Speed of Sound | 4602 m/s | 4940 m/s |
Thermal Properties - Enthalpies and thermodynamics
| Melting Point | 923 K | 3306 K |
| Boiling Point | 1363 K | 5285 K |
| Critical Temperature | - | - |
| Superconducting Point | - | 0.66 |
Enthalpies | ||
| Heat of Fusion | 8.7 kJ/mol | 31 kJ/mol |
| Heat of Vaporization | 128 kJ/mol | 630 kJ/mol |
| Heat of Combustion | -668 J/(kg K) | - |
Regulatory and Health - Health and Safety Parameters and Guidelines
| CAS Number | CAS7439-95-4 | CAS7440-04-2 |
| RTECS Number | - | RTECSRN1100000 |
| DOT Hazard Class | 4.1 | 4.1 |
| DOT Numbers | 2950 | 3089 |
| EU Number | - | - |
| NFPA Fire Rating | 1 | 4 |
| NFPA Hazards | - | - |
| NFPA Health Rating | 0 | - |
| NFPA Reactivity Rating | 1 | 1 |
| AutoIgnition Point | 472 °C | - |
| Flashpoint | 500 °C | - |