Input interpretation
![oxygen (chemical element)](../image_source/e24e981a4de40ccd5f34e98bbe4b3f2d.png)
oxygen (chemical element)
Periodic table location
![Periodic table location](../image_source/65a61161bf3041115ff6b69f2f8f7de0.png)
Periodic table location
Image
![Image](../image_source/3380a20f7ad8b843ec01bf9a833850b5.png)
Image
Basic elemental properties
![atomic symbol | O atomic number | 8 short electronic configuration | [He]2s^22p^4 Aufbau diagram | 2p 2s block | p group | 16 period | 2 atomic mass | 15.999 u (unified atomic mass units)](../image_source/59441b72f6dc2b7727204f0a57c1c4b3.png)
atomic symbol | O atomic number | 8 short electronic configuration | [He]2s^22p^4 Aufbau diagram | 2p 2s block | p group | 16 period | 2 atomic mass | 15.999 u (unified atomic mass units)
Thermodynamic properties
![phase at STP | gas melting point | -218.3 °C (rank: 98th) boiling point | -182.9 °C (rank: 88th) critical temperature | 154.59 K (rank: 15th) critical pressure | 5.043 MPa (rank: 16th) molar heat of fusion | 0.222 kJ/mol (rank: 92nd) molar heat of vaporization | 3.41 kJ/mol (rank: 89th) specific heat at STP | 919 J/(kg K) (rank: 11th) adiabatic index | 7/5 (rank: 1st) (properties at standard conditions)](../image_source/c460c3be93334e73d3184c1b003f021c.png)
phase at STP | gas melting point | -218.3 °C (rank: 98th) boiling point | -182.9 °C (rank: 88th) critical temperature | 154.59 K (rank: 15th) critical pressure | 5.043 MPa (rank: 16th) molar heat of fusion | 0.222 kJ/mol (rank: 92nd) molar heat of vaporization | 3.41 kJ/mol (rank: 89th) specific heat at STP | 919 J/(kg K) (rank: 11th) adiabatic index | 7/5 (rank: 1st) (properties at standard conditions)
Material properties
![density | 0.001429 g/cm^3 (rank: 92nd) molar volume | 11200 cm^3/mol refractive index | 1.000271 sound speed | 317.5 m/s (rank: 71st) thermal conductivity | 0.02658 W/(m K) (rank: 88th) (properties at standard conditions)](../image_source/2188df6fba948d33cd29d813f8557ef8.png)
density | 0.001429 g/cm^3 (rank: 92nd) molar volume | 11200 cm^3/mol refractive index | 1.000271 sound speed | 317.5 m/s (rank: 71st) thermal conductivity | 0.02658 W/(m K) (rank: 88th) (properties at standard conditions)
Electromagnetic properties
![magnetic type | paramagnetic volume magnetic susceptibility | 1.90772×10^-6 mass magnetic susceptibility | 1.335×10^-6 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 4.27184×10^-8 m^3/mol (cubic meters per mole) color | (colorless) refractive index | 1.000271](../image_source/869b315c12ccd5207c35c89f10f4901b.png)
magnetic type | paramagnetic volume magnetic susceptibility | 1.90772×10^-6 mass magnetic susceptibility | 1.335×10^-6 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 4.27184×10^-8 m^3/mol (cubic meters per mole) color | (colorless) refractive index | 1.000271
Reactivity
![valence | 2 electronegativity | 3.44 electron affinity | 141 kJ/mol (kilojoules per mole) first ionization energy | 1313.9 kJ/mol (kilojoules per mole) ionization energies | 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](../image_source/3743c4be4e3856ac5ccf7a05f5b6ab4b.png)
valence | 2 electronegativity | 3.44 electron affinity | 141 kJ/mol (kilojoules per mole) first ionization energy | 1313.9 kJ/mol (kilojoules per mole) ionization energies | 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](../image_source/4b0849e7a37ec8d75d7a4383c0f3272f.png)
Reactivity
Atomic properties
![term symbol | ^3P_2 atomic radius | 60 pm covalent radius | 66 pm van der Waals radius | 152 pm (electronic ground state properties)](../image_source/2166e9a3d1429aa2d13ea74785a64c39.png)
term symbol | ^3P_2 atomic radius | 60 pm covalent radius | 66 pm van der Waals radius | 152 pm (electronic ground state properties)
![(neutral oxygen atomic spectrum)](../image_source/ca01455259ad2595c4575386b5165a8d.png)
(neutral oxygen atomic spectrum)
Abundances
![universe abundance | 1 mass% (rank: 3rd) solar abundance | 0.9 mass% (rank: 3rd) meteorite abundance | 40 mass% (rank: 1st) crust abundance | 46 mass% (rank: 1st) ocean abundance | 86 mass% (rank: 1st) human abundance | 61 mass% (rank: 1st) universe molar abundance | 0.08 mol% (rank: 3rd) solar molar abundance | 0.07 mol% (rank: 3rd) meteorite molar abundance | 48 mol% (rank: 1st) ocean molar abundance | 33 mol% (rank: 2nd) crust molar abundance | 60 mol% (rank: 1st) human molar abundance | 24 mol% (rank: 2nd)](../image_source/dd2eba749649c0fa83e66ff125e785fd.png)
universe abundance | 1 mass% (rank: 3rd) solar abundance | 0.9 mass% (rank: 3rd) meteorite abundance | 40 mass% (rank: 1st) crust abundance | 46 mass% (rank: 1st) ocean abundance | 86 mass% (rank: 1st) human abundance | 61 mass% (rank: 1st) universe molar abundance | 0.08 mol% (rank: 3rd) solar molar abundance | 0.07 mol% (rank: 3rd) meteorite molar abundance | 48 mol% (rank: 1st) ocean molar abundance | 33 mol% (rank: 2nd) crust molar abundance | 60 mol% (rank: 1st) human molar abundance | 24 mol% (rank: 2nd)
Nuclear properties
![half-life | (stable) stable isotopes | O-16 (99.762%) | O-18 (0.2%) | O-17 (3.8×10^-4) nuclear spin | O-12: 0^+ | O-13: 3/2^- | O-14: 0^+ | O-15: 1/2^- | O-16: 0^+ | O-17: 5/2^+ | O-18: 0^+ | O-19: 5/2^+ | O-20: 0^+ | O-21: 5/2^+ | O-22: 0^+ | O-23: 1/2^+ | O-24: 0^+ | O-25: 3/2^+ | O-26: 0^+ | O-27: 3/2^+ | O-28: 0^+ unstable isotopes | O-15 (122.24 s) | O-14 (70.606 s) | O-19 (26.88 s) | O-20 (13.51 s) | O-21 (3.42 s) | O-22 (2.25 s) | O-23 (82 ms) | O-24 (65 ms) | O-13 (8.58 ms) | O-27 (260 ns) | O-28 (100 ns) | O-25 (50 ns) | O-26 (40 ns) | O-12 (1.14 zs) neutron cross-section | 2.8×10^-4 b neutron mass absorption | 1×10^-6 m^2/kg](../image_source/89045f67796e686b1e93294d913d0d49.png)
half-life | (stable) stable isotopes | O-16 (99.762%) | O-18 (0.2%) | O-17 (3.8×10^-4) nuclear spin | O-12: 0^+ | O-13: 3/2^- | O-14: 0^+ | O-15: 1/2^- | O-16: 0^+ | O-17: 5/2^+ | O-18: 0^+ | O-19: 5/2^+ | O-20: 0^+ | O-21: 5/2^+ | O-22: 0^+ | O-23: 1/2^+ | O-24: 0^+ | O-25: 3/2^+ | O-26: 0^+ | O-27: 3/2^+ | O-28: 0^+ unstable isotopes | O-15 (122.24 s) | O-14 (70.606 s) | O-19 (26.88 s) | O-20 (13.51 s) | O-21 (3.42 s) | O-22 (2.25 s) | O-23 (82 ms) | O-24 (65 ms) | O-13 (8.58 ms) | O-27 (260 ns) | O-28 (100 ns) | O-25 (50 ns) | O-26 (40 ns) | O-12 (1.14 zs) neutron cross-section | 2.8×10^-4 b neutron mass absorption | 1×10^-6 m^2/kg
Identifiers
![CAS number | 7782-44-7 PubChem CID number | 977](../image_source/c2c27e6ea90b40e0b2c781c02a8befbc.png)
CAS number | 7782-44-7 PubChem CID number | 977