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Fe, H, O

Input interpretation

iron (chemical element) | hydrogen (chemical element) | oxygen (chemical element)
iron (chemical element) | hydrogen (chemical element) | oxygen (chemical element)

Periodic table location

Periodic table location
Periodic table location

Images

Images
Images

Basic elemental properties

| iron | hydrogen | oxygen atomic symbol | Fe | H | O atomic number | 26 | 1 | 8 short electronic configuration | [Ar]4s^23d^6 | 1s^1 | [He]2s^22p^4 Aufbau diagram | 3d 4s | 1s | 2p 2s block | d | s | p group | 8 | 1 | 16 period | 4 | 1 | 2 atomic mass | 55.845 u | 1.008 u | 15.999 u half-life | (stable) | (stable) | (stable)
| iron | hydrogen | oxygen atomic symbol | Fe | H | O atomic number | 26 | 1 | 8 short electronic configuration | [Ar]4s^23d^6 | 1s^1 | [He]2s^22p^4 Aufbau diagram | 3d 4s | 1s | 2p 2s block | d | s | p group | 8 | 1 | 16 period | 4 | 1 | 2 atomic mass | 55.845 u | 1.008 u | 15.999 u half-life | (stable) | (stable) | (stable)

Thermodynamic properties

| iron | hydrogen | oxygen phase at STP | solid | gas | gas melting point | 1538 °C | -259.14 °C | -218.3 °C boiling point | 2861 °C | -252.87 °C | -182.9 °C critical temperature | (unknown) | 32.97 K | 154.59 K critical pressure | (unknown) | 1.293 MPa | 5.043 MPa molar heat of fusion | 13.8 kJ/mol | 0.558 kJ/mol | 0.222 kJ/mol molar heat of vaporization | 347 kJ/mol | 0.452 kJ/mol | 3.41 kJ/mol specific heat at STP | 449 J/(kg K) | 14300 J/(kg K) | 919 J/(kg K) adiabatic index | | 7/5 | 7/5 (properties at standard conditions)
| iron | hydrogen | oxygen phase at STP | solid | gas | gas melting point | 1538 °C | -259.14 °C | -218.3 °C boiling point | 2861 °C | -252.87 °C | -182.9 °C critical temperature | (unknown) | 32.97 K | 154.59 K critical pressure | (unknown) | 1.293 MPa | 5.043 MPa molar heat of fusion | 13.8 kJ/mol | 0.558 kJ/mol | 0.222 kJ/mol molar heat of vaporization | 347 kJ/mol | 0.452 kJ/mol | 3.41 kJ/mol specific heat at STP | 449 J/(kg K) | 14300 J/(kg K) | 919 J/(kg K) adiabatic index | | 7/5 | 7/5 (properties at standard conditions)

Material properties

| iron | hydrogen | oxygen density | 7.874 g/cm^3 | 8.99×10^-5 g/cm^3 | 0.001429 g/cm^3 liquid density | 6.98 g/cm^3 | | molar volume | 7.092 cm^3/mol | 11200 cm^3/mol | 11200 cm^3/mol Mohs hardness | 4 (≈ fluorite) | | Vickers hardness | 608 MPa | | Brinell hardness | 490 MPa | | bulk modulus | 170 GPa | | shear modulus | 82 GPa | | Young's modulus | 211 GPa | | Poisson ratio | 0.29 | | tensile yield strength | 50 MPa | | refractive index | (unknown) | 1.000132 | 1.000271 sound speed | 4910 m/s | 1270 m/s | 317.5 m/s thermal expansion | 1.18×10^-5 K^(-1) | | thermal conductivity | 80 W/(m K) | 0.1805 W/(m K) | 0.02658 W/(m K) (properties at standard conditions)
| iron | hydrogen | oxygen density | 7.874 g/cm^3 | 8.99×10^-5 g/cm^3 | 0.001429 g/cm^3 liquid density | 6.98 g/cm^3 | | molar volume | 7.092 cm^3/mol | 11200 cm^3/mol | 11200 cm^3/mol Mohs hardness | 4 (≈ fluorite) | | Vickers hardness | 608 MPa | | Brinell hardness | 490 MPa | | bulk modulus | 170 GPa | | shear modulus | 82 GPa | | Young's modulus | 211 GPa | | Poisson ratio | 0.29 | | tensile yield strength | 50 MPa | | refractive index | (unknown) | 1.000132 | 1.000271 sound speed | 4910 m/s | 1270 m/s | 317.5 m/s thermal expansion | 1.18×10^-5 K^(-1) | | thermal conductivity | 80 W/(m K) | 0.1805 W/(m K) | 0.02658 W/(m K) (properties at standard conditions)

Electromagnetic properties

| iron | hydrogen | oxygen electrical type | conductor | | resistivity | 9.7×10^-8 Ω m (ohm meters) | | electrical conductivity | 1×10^7 S/m (siemens per meter) | | magnetic type | ferromagnetic | diamagnetic | paramagnetic volume magnetic susceptibility | | -2.23×10^-9 | 1.90772×10^-6 mass magnetic susceptibility | | -2.48×10^-8 m^3/kg (cubic meters per kilogram) | 1.335×10^-6 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | | -4.999×10^-11 m^3/mol (cubic meters per mole) | 4.27184×10^-8 m^3/mol (cubic meters per mole) Curie point | 1043 K (kelvins) | | work function | (4.67 to 4.81) eV | | threshold frequency | (1.129×10^15 to 1.163×10^15) Hz (hertz) | | color | (gray) | (colorless) | (colorless) refractive index | (unknown) | 1.000132 | 1.000271
| iron | hydrogen | oxygen electrical type | conductor | | resistivity | 9.7×10^-8 Ω m (ohm meters) | | electrical conductivity | 1×10^7 S/m (siemens per meter) | | magnetic type | ferromagnetic | diamagnetic | paramagnetic volume magnetic susceptibility | | -2.23×10^-9 | 1.90772×10^-6 mass magnetic susceptibility | | -2.48×10^-8 m^3/kg (cubic meters per kilogram) | 1.335×10^-6 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | | -4.999×10^-11 m^3/mol (cubic meters per mole) | 4.27184×10^-8 m^3/mol (cubic meters per mole) Curie point | 1043 K (kelvins) | | work function | (4.67 to 4.81) eV | | threshold frequency | (1.129×10^15 to 1.163×10^15) Hz (hertz) | | color | (gray) | (colorless) | (colorless) refractive index | (unknown) | 1.000132 | 1.000271

Reactivity

| iron | hydrogen | oxygen valence | 3 | 1 | 2 electronegativity | 1.83 | 2.2 | 3.44 electron affinity | 15.7 kJ/mol (kilojoules per mole) | 72.8 kJ/mol (kilojoules per mole) | 141 kJ/mol (kilojoules per mole) first ionization energy | 762.5 kJ/mol (kilojoules per mole) | 1312 kJ/mol (kilojoules per mole) | 1313.9 kJ/mol (kilojoules per mole) ionization energies | 762.5 kJ/mol | 1561.9 kJ/mol | 2957 kJ/mol | 5290 kJ/mol | 7240 kJ/mol | 9560 kJ/mol | 12060 kJ/mol | 14580 kJ/mol | 22540 kJ/mol | 25290 kJ/mol | 28000 kJ/mol | 31920 kJ/mol | 34830 kJ/mol | 37840 kJ/mol | 44100 kJ/mol | 47206 kJ/mol | 122200 kJ/mol | 131000 kJ/mol | 140500 kJ/mol | 152600 kJ/mol | 163000 kJ/mol | 1312 kJ/mol | 1313.9 kJ/mol | 3388.3 kJ/mol | 5300.5 kJ/mol | 7469.2 kJ/mol | 10989.5 kJ/mol | 13326.5 kJ/mol | 71330 kJ/mol | 84078 kJ/mol
| iron | hydrogen | oxygen valence | 3 | 1 | 2 electronegativity | 1.83 | 2.2 | 3.44 electron affinity | 15.7 kJ/mol (kilojoules per mole) | 72.8 kJ/mol (kilojoules per mole) | 141 kJ/mol (kilojoules per mole) first ionization energy | 762.5 kJ/mol (kilojoules per mole) | 1312 kJ/mol (kilojoules per mole) | 1313.9 kJ/mol (kilojoules per mole) ionization energies | 762.5 kJ/mol | 1561.9 kJ/mol | 2957 kJ/mol | 5290 kJ/mol | 7240 kJ/mol | 9560 kJ/mol | 12060 kJ/mol | 14580 kJ/mol | 22540 kJ/mol | 25290 kJ/mol | 28000 kJ/mol | 31920 kJ/mol | 34830 kJ/mol | 37840 kJ/mol | 44100 kJ/mol | 47206 kJ/mol | 122200 kJ/mol | 131000 kJ/mol | 140500 kJ/mol | 152600 kJ/mol | 163000 kJ/mol | 1312 kJ/mol | 1313.9 kJ/mol | 3388.3 kJ/mol | 5300.5 kJ/mol | 7469.2 kJ/mol | 10989.5 kJ/mol | 13326.5 kJ/mol | 71330 kJ/mol | 84078 kJ/mol
Reactivity
Reactivity

Atomic properties

| iron | hydrogen | oxygen term symbol | ^5D_4 | ^2S_(1/2) | ^3P_2 atomic radius | 140 pm | 25 pm | 60 pm covalent radius | 132 pm | 31 pm | 66 pm van der Waals radius | (unknown) | 120 pm | 152 pm (electronic ground state properties)
| iron | hydrogen | oxygen term symbol | ^5D_4 | ^2S_(1/2) | ^3P_2 atomic radius | 140 pm | 25 pm | 60 pm covalent radius | 132 pm | 31 pm | 66 pm van der Waals radius | (unknown) | 120 pm | 152 pm (electronic ground state properties)

Abundances

| iron | hydrogen | oxygen universe abundance | 0.11 mass% | 75 mass% | 1 mass% solar abundance | 0.1 mass% | 75 mass% | 0.9 mass% meteorite abundance | 22 mass% | 2.4 mass% | 40 mass% crust abundance | 6.3 mass% | 0.15 mass% | 46 mass% ocean abundance | 3×10^-7 mass% | 11 mass% | 86 mass% human abundance | 0.006 mass% | 10 mass% | 61 mass% universe molar abundance | 0.002 mol% | 93 mol% | 0.08 mol% solar molar abundance | 0.003 mol% | 93 mol% | 0.07 mol% meteorite molar abundance | 7.8 mol% | 17 mol% | 48 mol% ocean molar abundance | 3.3×10^-8 mol% | 66 mol% | 33 mol% crust molar abundance | 2.3 mol% | 3.1 mol% | 60 mol% human molar abundance | 6.7×10^-4 mol% | 62 mol% | 24 mol%
| iron | hydrogen | oxygen universe abundance | 0.11 mass% | 75 mass% | 1 mass% solar abundance | 0.1 mass% | 75 mass% | 0.9 mass% meteorite abundance | 22 mass% | 2.4 mass% | 40 mass% crust abundance | 6.3 mass% | 0.15 mass% | 46 mass% ocean abundance | 3×10^-7 mass% | 11 mass% | 86 mass% human abundance | 0.006 mass% | 10 mass% | 61 mass% universe molar abundance | 0.002 mol% | 93 mol% | 0.08 mol% solar molar abundance | 0.003 mol% | 93 mol% | 0.07 mol% meteorite molar abundance | 7.8 mol% | 17 mol% | 48 mol% ocean molar abundance | 3.3×10^-8 mol% | 66 mol% | 33 mol% crust molar abundance | 2.3 mol% | 3.1 mol% | 60 mol% human molar abundance | 6.7×10^-4 mol% | 62 mol% | 24 mol%

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