Periodic Table Element Comparison: Compare Elements - Argon vs Osmium
Compare Argon 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 Argon vs Osmium with most reliable information about their properties, attributes, facts, uses etc. You can compare Ar vs Os on more than 90 properties like electronegativity , oxidation state, atomic shells, orbital structure, Electronaffinity, physical states, electrical conductivity and many more. Argon and Osmium comparison table on more than 90 properties.
Argon and Osmium Comparison
Facts
| Name | Argon | Osmium |
|---|---|---|
| Atomic Number | 18 | 76 |
| Atomic Symbol | Ar | Os |
| Atomic Weight | 39.948 | 190.23 |
| Phase at STP | Gas | Solid |
| Color | Colorless | SlateGray |
| Metallic Classification | Noble Gas | Transition Metal |
| Group in Periodic Table | group 18 | group 8 |
| Group Name | helium family or neon family | iron family |
| Period in Periodic Table | period 3 | period 6 |
| Block in Periodic Table | p -block | d -block |
| Electronic Configuration | [Ne] 3s2 3p6 | [Xe] 4f14 5d6 6s2 |
| Electronic Shell Structure (Electrons per shell) | 2, 8, 8 | 2, 8, 18, 32, 14, 2 |
| Melting Point | 83.8 K | 3306 K |
| Boiling Point | 87.3 K | 5285 K |
| CAS Number | CAS7440-37-1 | CAS7440-04-2 |
| Neighborhood Elements | Neighborhood Elements of Argon | Neighborhood Elements of Osmium |
History
| Parameter | Argon | Osmium |
|---|---|---|
| History | The element Argon was discovered by Lord Rayleigh and W. Ramsay in year 1894 in United Kingdom. Argon derived its name from the Greek word argos, meaning 'idle'. | 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 | Lord Rayleigh and W. Ramsay (1894) | S. Tennant (1803) |
| Isolated | Lord Rayleigh and W. Ramsay (1894) | S. Tennant (1803) |
Presence: Abundance in Nature and Around Us
Parts per billion (ppb) by weight / by atoms (1ppb =10^-7 %)
| Property | Argon | Osmium |
|---|---|---|
| Abundance in Universe | 200000 / 6000 | 3 / 0.02 |
| Abundance in Sun | 70000 / 2000 | 2 / 0.02 |
| Abundance in Meteorites | - / - | 670 / 70 |
| Abundance in Earth's Crust | 1500 / 780 | 1.8 / 0.2 |
| Abundance in Oceans | 450 / 70 | - / - |
| Abundance in Humans | - / - | - / - |
Crystal Structure and Atomic Structure
| Property | Argon | Osmium |
|---|---|---|
| Atomic Volume | 22.4134 cm3/mol | 8.421 cm3/mol |
| Atomic Radius | 71 pm | 185 pm |
| Covalent Radius | 97 pm | 128 pm |
| Van der Waals Radius | 188 pm | - |
Atomic Spectrum - Spectral Lines | ||
| Emission Spectrum |  |  |
| Absorption Spectrum |  |  |
| Lattice Constant | 525.6, 525.6, 525.6 pm | 273.44, 273.44, 431.73 pm |
| Lattice Angle | π/2, π/2, π/2 | π/2, π/2, 2 π/3 |
| Space Group Name | Fm_ 3m | P63/mmc |
| Space Group Number | 225 | 194 |
| Crystal Structure | Face Centered Cubic  | Simple Hexagonal  |
Atomic and Orbital Properties
| Property | Argon | Osmium |
|---|---|---|
| Atomic Number | 18 | 76 |
| Number of Electrons (with no charge) | 18 | 76 |
| Number of Protons | 18 | 76 |
| Mass Number | 39.948 | 190.23 |
| Number of Neutrons | 22 | 114 |
| Shell structure (Electrons per energy level) | 2, 8, 8 | 2, 8, 18, 32, 14, 2 |
| Electron Configuration | [Ne] 3s2 3p6 | [Xe] 4f14 5d6 6s2 |
| Valence Electrons | 3s2 3p6 | 5d6 6s2 |
| Oxidation State | 0 | 4 |
| Atomic Term Symbol (Quantum Numbers) | 1S0 | 5D4 |
| Shell structure |  |  |
Isotopes and Nuclear Properties
Argon has 3 stable naturally occuring isotopes while Osmium has 6 stable naturally occuring isotopes.
| Parameter | Argon | Osmium |
|---|---|---|
| Known Isotopes | 30Ar, 31Ar, 32Ar, 33Ar, 34Ar, 35Ar, 36Ar, 37Ar, 38Ar, 39Ar, 40Ar, 41Ar, 42Ar, 43Ar, 44Ar, 45Ar, 46Ar, 47Ar, 48Ar, 49Ar, 50Ar, 51Ar, 52Ar, 53Ar | 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: 36Ar, 38Ar, 40Ar | Naturally occurring stable isotopes: 184Os, 187Os, 188Os, 189Os, 190Os, 192Os |
| Neutron Cross Section | 0.65 | 15 |
| Neutron Mass Absorption | 0.0006 | 0.0023 |
Chemical Properties: Ionization Energies and electron affinity
| Property | Argon | Osmium |
|---|---|---|
| Valence or Valency | 0 | 6 |
| Electronegativity | - | 2.2 Pauling Scale |
| Electron Affinity | 0 kJ/mol | 106.1 kJ/mol |
| Ionization Energies | 1st: 1520.6 kJ/mol 2nd: 2665.8 kJ/mol 3rd: 3931 kJ/mol 4th: 5771 kJ/mol 5th: 7238 kJ/mol 6th: 8781 kJ/mol 7th: 11995 kJ/mol 8th: 13842 kJ/mol 9th: 40760 kJ/mol 10th: 46186 kJ/mol 11th: 52002 kJ/mol 12th: 59653 kJ/mol 13th: 66199 kJ/mol 14th: 72918 kJ/mol 15th: 82473 kJ/mol 16th: 88576 kJ/mol 17th: 397605 kJ/mol 18th: 427066 kJ/mol | 1st: 840 kJ/mol 2nd: 1600 kJ/mol |
Physical Properties
| Property | Argon | Osmium |
|---|---|---|
| Density | 0.001784 g/cm3 | 22.59 g/cm3 |
| Molar Volume | 22.4134 cm3/mol | 8.421 cm3/mol |
Elastic Properties | ||
| Young Modulus | - | - |
| Shear Modulus | - | 222 GPa |
| Bulk Modulus | - | - |
| Poisson Ratio | - | 0.25 |
Hardness - Tests to Measure of Hardness of Element | ||
| Mohs Hardness | - | 7 MPa |
| Vickers Hardness | - | - |
| Brinell Hardness | - | 3920 MPa |
Electrical Properties | ||
| Electrical Conductivity | - | 12000000 S/m |
| Resistivity | - | 8.1e-8 m Ω |
| Superconducting Point | - | 0.66 |
Heat and Conduction Properties | ||
| Thermal Conductivity | 0.01772 W/(m K) | 88 W/(m K) |
| Thermal Expansion | - | 0.0000051 /K |
Magnetic Properties | ||
| Magnetic Type | Diamagnetic | Paramagnetic |
| Curie Point | - | - |
| Mass Magnetic Susceptibility | -6e-9 m3/kg | 6e-10 m3/kg |
| Molar Magnetic Susceptibility | -2.4e-10 m3/mol | 1.1e-10 m3/mol |
| Volume Magnetic Susceptibility | -1.07e-8 | 0.000014 |
Optical Properties | ||
| Refractive Index | 1.000281 | - |
Acoustic Properties | ||
| Speed of Sound | 319 m/s | 4940 m/s |
Thermal Properties - Enthalpies and thermodynamics
| Property | Argon | Osmium |
|---|---|---|
| Melting Point | 83.8 K | 3306 K |
| Boiling Point | 87.3 K | 5285 K |
| Critical Temperature | 150.87 K | - |
| Superconducting Point | - | 0.66 |
Enthalpies | ||
| Heat of Fusion | 1.18 kJ/mol | 31 kJ/mol |
| Heat of Vaporization | 6.5 kJ/mol | 630 kJ/mol |
| Heat of Combustion | - | - |
Regulatory and Health - Health and Safety Parameters and Guidelines
| Parameter | Argon | Osmium |
|---|---|---|
| CAS Number | CAS7440-37-1 | CAS7440-04-2 |
| RTECS Number | RTECSCF2300000 | RTECSRN1100000 |
| DOT Hazard Class | 2.2 | 4.1 |
| DOT Numbers | 1951 | 3089 |
| EU Number | - | - |
| NFPA Fire Rating | - | 4 |
| NFPA Health Rating | - | - |
| NFPA Reactivity Rating | - | 1 |
| NFPA Hazards | - | - |
| AutoIgnition Point | - | - |
| Flashpoint | - | - |
Compare With Other Elements
Compare Argon and Osmium with other elements of the periodic table.