mercury vs iridium vs osmium

mercury (chemical element) | iridium (chemical element) | osmium (chemical element)

Periodic table location

Images

| mercury | iridium | osmium atomic symbol | Hg | Ir | Os atomic number | 80 | 77 | 76 short electronic configuration | [Xe]6s^24f^145d^10 | [Xe]6s^24f^145d^7 | [Xe]6s^24f^145d^6 Aufbau diagram | 5d 4f 6s | 5d 4f 6s | 5d 4f 6s block | d | d | d group | 12 | 9 | 8 period | 6 | 6 | 6 atomic mass | 200.592 u | 192.217 u | 190.23 u half-life | (stable) | (stable) | (stable)

| mercury | iridium | osmium phase at STP | liquid | solid | solid melting point | -38.83 °C | 2466 °C | 3033 °C boiling point | 356.73 °C | 4428 °C | 5012 °C critical temperature | 1750 K | | critical pressure | 172 MPa | | molar heat of fusion | 2.29 kJ/mol | 26 kJ/mol | 31 kJ/mol molar heat of vaporization | 59.2 kJ/mol | 560 kJ/mol | 630 kJ/mol specific heat at STP | 139.5 J/(kg K) | 131 J/(kg K) | 130 J/(kg K) (properties at standard conditions)

| mercury | iridium | osmium density | 13.534 g/cm^3 | 22.56 g/cm^3 | 22.59 g/cm^3 liquid density | 13.534 g/cm^3 | 19 g/cm^3 | 20 g/cm^3 molar volume | 14.821 cm^3/mol | 8.52 cm^3/mol | 8.421 cm^3/mol Mohs hardness | | 6.5 (between microcline and quartz) | 7 (≈ quartz) Vickers hardness | | 1760 MPa | 4140 MPa Brinell hardness | | 1670 MPa | 3920 MPa bulk modulus | 25 GPa | 320 GPa | shear modulus | | 210 GPa | 222 GPa Young's modulus | | 528 GPa | Poisson ratio | | 0.26 | 0.25 refractive index | 1.000933 | | sound speed | 1407 m/s | 4825 m/s | 4940 m/s thermal expansion | 1.81×10^-4 K^(-1) | 6.4×10^-6 K^(-1) | 5.1×10^-6 K^(-1) thermal conductivity | 8.3 W/(m K) | 150 W/(m K) | 88 W/(m K) (properties at standard conditions)

| mercury | iridium | osmium electrical type | conductor | conductor | conductor resistivity | 9.6×10^-7 Ω m (ohm meters) | 4.7×10^-8 Ω m (ohm meters) | 8.1×10^-8 Ω m (ohm meters) electrical conductivity | 1×10^6 S/m (siemens per meter) | 2.1×10^7 S/m (siemens per meter) | 1.2×10^7 S/m (siemens per meter) magnetic type | diamagnetic | paramagnetic | paramagnetic volume magnetic susceptibility | -2.84×10^-5 | 3.77×10^-5 | 1.4×10^-5 mass magnetic susceptibility | -2.1×10^-9 m^3/kg (cubic meters per kilogram) | 1.67×10^-9 m^3/kg (cubic meters per kilogram) | 6×10^-10 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | -4.21×10^-10 m^3/mol (cubic meters per mole) | 3.21×10^-10 m^3/mol (cubic meters per mole) | 1.1×10^-10 m^3/mol (cubic meters per mole) work function | 4.47 eV (Liquid) | (5 to 5.76) eV | 5.93 eV (Polycrystalline) threshold frequency | 1.082×10^15 Hz (hertz) | (1.209×10^15 to 1.393×10^15) Hz (hertz) | 1.434×10^15 Hz (hertz) superconducting point | 4.154 K (kelvins) | 0.11 K (kelvins) | 0.66 K (kelvins) color | (silver) | (silver) | (slate gray) refractive index | 1.000933 | |

| mercury | iridium | osmium valence | 2 | 6 | 6 electronegativity | 2 | 2.2 | 2.2 electron affinity | 0 kJ/mol (kilojoules per mole) | 151 kJ/mol (kilojoules per mole) | 106.1 kJ/mol (kilojoules per mole) first ionization energy | 1007.1 kJ/mol (kilojoules per mole) | 880 kJ/mol (kilojoules per mole) | 840 kJ/mol (kilojoules per mole) ionization energies | 1007.1 kJ/mol | 1810 kJ/mol | 3300 kJ/mol | 880 kJ/mol | 1600 kJ/mol | 840 kJ/mol | 1600 kJ/mol

Reactivity

| mercury | iridium | osmium term symbol | ^1S_0 | ^4F_(9/2) | ^5D_4 atomic radius | 150 pm | 135 pm | 130 pm covalent radius | 132 pm | 141 pm | 144 pm van der Waals radius | 155 pm | | (electronic ground state properties)

| mercury | iridium | osmium universe abundance | 1×10^-7 mass% | 2×10^-7 mass% | 3×10^-7 mass% solar abundance | 2×10^-6 mass% | 2×10^-7 mass% | 2×10^-7 mass% meteorite abundance | 2.5×10^-5 mass% | 5.4×10^-5 mass% | 6.6×10^-5 mass% crust abundance | 6.7×10^-6 mass% | 4×10^-8 mass% | 1.8×10^-7 mass% ocean abundance | 5×10^-9 mass% | | universe molar abundance | 6×10^-10 mol% | 1×10^-9 mol% | 2×10^-9 mol% solar molar abundance | 1.2×10^-8 mol% | 9.9×10^-10 mol% | 2×10^-9 mol% meteorite molar abundance | 2×10^-6 mol% | 6×10^-6 mol% | 7×10^-6 mol% ocean molar abundance | 1.5×10^-10 mol% | | crust molar abundance | 7×10^-7 mol% | 5×10^-9 mol% | 2×10^-8 mol%