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B, O

Input interpretation

boron (chemical element) | oxygen (chemical element)
boron (chemical element) | oxygen (chemical element)

Periodic table location

Periodic table location
Periodic table location

Images

Images
Images

Basic elemental properties

| boron | oxygen atomic symbol | B | O atomic number | 5 | 8 short electronic configuration | [He]2s^22p^1 | [He]2s^22p^4 Aufbau diagram | 2p 2s | 2p 2s block | p | p group | 13 | 16 period | 2 | 2 atomic mass | 10.81 u | 15.999 u half-life | (stable) | (stable)
| boron | oxygen atomic symbol | B | O atomic number | 5 | 8 short electronic configuration | [He]2s^22p^1 | [He]2s^22p^4 Aufbau diagram | 2p 2s | 2p 2s block | p | p group | 13 | 16 period | 2 | 2 atomic mass | 10.81 u | 15.999 u half-life | (stable) | (stable)

Thermodynamic properties

| boron | oxygen phase at STP | solid | gas melting point | 2075 °C | -218.3 °C boiling point | 4000 °C | -182.9 °C critical temperature | | 154.59 K critical pressure | | 5.043 MPa molar heat of fusion | 50 kJ/mol | 0.222 kJ/mol molar heat of vaporization | 507 kJ/mol | 3.41 kJ/mol specific heat at STP | 1030 J/(kg K) | 919 J/(kg K) adiabatic index | | 7/5 (properties at standard conditions)
| boron | oxygen phase at STP | solid | gas melting point | 2075 °C | -218.3 °C boiling point | 4000 °C | -182.9 °C critical temperature | | 154.59 K critical pressure | | 5.043 MPa molar heat of fusion | 50 kJ/mol | 0.222 kJ/mol molar heat of vaporization | 507 kJ/mol | 3.41 kJ/mol specific heat at STP | 1030 J/(kg K) | 919 J/(kg K) adiabatic index | | 7/5 (properties at standard conditions)

Material properties

| boron | oxygen density | 2.46 g/cm^3 | 0.001429 g/cm^3 liquid density | 2.08 g/cm^3 | molar volume | 4.394 cm^3/mol | 11200 cm^3/mol Mohs hardness | 9.3 (between corundum and diamond) | Vickers hardness | 49000 MPa | bulk modulus | 320 GPa | ultimate tensile strength | 2 MPa | refractive index | | 1.000271 sound speed | 16200 m/s | 317.5 m/s thermal expansion | 6×10^-6 K^(-1) | thermal conductivity | 27 W/(m K) | 0.02658 W/(m K) (properties at standard conditions)
| boron | oxygen density | 2.46 g/cm^3 | 0.001429 g/cm^3 liquid density | 2.08 g/cm^3 | molar volume | 4.394 cm^3/mol | 11200 cm^3/mol Mohs hardness | 9.3 (between corundum and diamond) | Vickers hardness | 49000 MPa | bulk modulus | 320 GPa | ultimate tensile strength | 2 MPa | refractive index | | 1.000271 sound speed | 16200 m/s | 317.5 m/s thermal expansion | 6×10^-6 K^(-1) | thermal conductivity | 27 W/(m K) | 0.02658 W/(m K) (properties at standard conditions)

Electromagnetic properties

| boron | oxygen electrical type | insulator | resistivity | 10000 Ω m (ohm meters) | electrical conductivity | 1×10^-4 S/m (siemens per meter) | magnetic type | diamagnetic | paramagnetic volume magnetic susceptibility | -2.14×10^-5 | 1.90772×10^-6 mass magnetic susceptibility | -8.7×10^-9 m^3/kg (cubic meters per kilogram) | 1.335×10^-6 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | -9.41×10^-11 m^3/mol (cubic meters per mole) | 4.27184×10^-8 m^3/mol (cubic meters per mole) work function | 4.45 eV (Polycrystalline) | threshold frequency | 1.076×10^15 Hz (hertz) | color | (black) | (colorless) refractive index | | 1.000271
| boron | oxygen electrical type | insulator | resistivity | 10000 Ω m (ohm meters) | electrical conductivity | 1×10^-4 S/m (siemens per meter) | magnetic type | diamagnetic | paramagnetic volume magnetic susceptibility | -2.14×10^-5 | 1.90772×10^-6 mass magnetic susceptibility | -8.7×10^-9 m^3/kg (cubic meters per kilogram) | 1.335×10^-6 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | -9.41×10^-11 m^3/mol (cubic meters per mole) | 4.27184×10^-8 m^3/mol (cubic meters per mole) work function | 4.45 eV (Polycrystalline) | threshold frequency | 1.076×10^15 Hz (hertz) | color | (black) | (colorless) refractive index | | 1.000271

Reactivity

| boron | oxygen valence | 3 | 2 electronegativity | 2.04 | 3.44 electron affinity | 26.7 kJ/mol (kilojoules per mole) | 141 kJ/mol (kilojoules per mole) first ionization energy | 800.6 kJ/mol (kilojoules per mole) | 1313.9 kJ/mol (kilojoules per mole) ionization energies | 800.6 kJ/mol | 2427.1 kJ/mol | 3659.7 kJ/mol | 25025.8 kJ/mol | 32826.7 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
| boron | oxygen valence | 3 | 2 electronegativity | 2.04 | 3.44 electron affinity | 26.7 kJ/mol (kilojoules per mole) | 141 kJ/mol (kilojoules per mole) first ionization energy | 800.6 kJ/mol (kilojoules per mole) | 1313.9 kJ/mol (kilojoules per mole) ionization energies | 800.6 kJ/mol | 2427.1 kJ/mol | 3659.7 kJ/mol | 25025.8 kJ/mol | 32826.7 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

| boron | oxygen term symbol | ^2P_(1/2) | ^3P_2 atomic radius | 85 pm | 60 pm covalent radius | 84 pm | 66 pm van der Waals radius | | 152 pm (electronic ground state properties)
| boron | oxygen term symbol | ^2P_(1/2) | ^3P_2 atomic radius | 85 pm | 60 pm covalent radius | 84 pm | 66 pm van der Waals radius | | 152 pm (electronic ground state properties)

Abundances

| boron | oxygen universe abundance | 1×10^-7 mass% | 1 mass% solar abundance | 2×10^-7 mass% | 0.9 mass% meteorite abundance | 1.6×10^-4 mass% | 40 mass% crust abundance | 8.6×10^-4 mass% | 46 mass% ocean abundance | 4.4×10^-4 mass% | 86 mass% human abundance | 7×10^-5 mass% | 61 mass% universe molar abundance | 1×10^-8 mol% | 0.08 mol% solar molar abundance | 2×10^-8 mol% | 0.07 mol% meteorite molar abundance | 3×10^-4 mol% | 48 mol% ocean molar abundance | 2.5×10^-4 mol% | 33 mol% crust molar abundance | 0.0017 mol% | 60 mol% human molar abundance | 4.1×10^-5 mol% | 24 mol%
| boron | oxygen universe abundance | 1×10^-7 mass% | 1 mass% solar abundance | 2×10^-7 mass% | 0.9 mass% meteorite abundance | 1.6×10^-4 mass% | 40 mass% crust abundance | 8.6×10^-4 mass% | 46 mass% ocean abundance | 4.4×10^-4 mass% | 86 mass% human abundance | 7×10^-5 mass% | 61 mass% universe molar abundance | 1×10^-8 mol% | 0.08 mol% solar molar abundance | 2×10^-8 mol% | 0.07 mol% meteorite molar abundance | 3×10^-4 mol% | 48 mol% ocean molar abundance | 2.5×10^-4 mol% | 33 mol% crust molar abundance | 0.0017 mol% | 60 mol% human molar abundance | 4.1×10^-5 mol% | 24 mol%

Nuclear properties

| boron | oxygen half-life | (stable) | (stable) stable isotopes | B-11 (80.2%) | B-10 (19.8%) | O-16 (99.762%) | O-18 (0.2%) | O-17 (3.8×10^-4) nuclear spin | B-6: 2^- | B-7: 3/2^- | B-8: 2^+ | B-9: 3/2^- | B-10: 3^+ | B-11: 3/2^- | B-12: 1^+ | B-13: 3/2^- | B-14: 2^- | B-15: 3/2^- | B-16: 0^- | B-17: 3/2^- | B-18: 4^- | B-19: 3/2^- | 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 | B-8 (770 ms) | B-12 (20.2 ms) | B-13 (17.33 ms) | B-14 (12.5 ms) | B-15 (9.93 ms) | B-17 (5.08 ms) | B-19 (2.92 ms) | B-18 (26 ns) | B-16 (190 ps) | B-9 (845 zs) | B-7 (0.33 zs) | 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 | 760 b | 2.8×10^-4 b neutron mass absorption | 2.4 m^2/kg | 1×10^-6 m^2/kg
| boron | oxygen half-life | (stable) | (stable) stable isotopes | B-11 (80.2%) | B-10 (19.8%) | O-16 (99.762%) | O-18 (0.2%) | O-17 (3.8×10^-4) nuclear spin | B-6: 2^- | B-7: 3/2^- | B-8: 2^+ | B-9: 3/2^- | B-10: 3^+ | B-11: 3/2^- | B-12: 1^+ | B-13: 3/2^- | B-14: 2^- | B-15: 3/2^- | B-16: 0^- | B-17: 3/2^- | B-18: 4^- | B-19: 3/2^- | 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 | B-8 (770 ms) | B-12 (20.2 ms) | B-13 (17.33 ms) | B-14 (12.5 ms) | B-15 (9.93 ms) | B-17 (5.08 ms) | B-19 (2.92 ms) | B-18 (26 ns) | B-16 (190 ps) | B-9 (845 zs) | B-7 (0.33 zs) | 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 | 760 b | 2.8×10^-4 b neutron mass absorption | 2.4 m^2/kg | 1×10^-6 m^2/kg

Identifiers

| boron | oxygen CAS number | 7440-42-8 | 7782-44-7 PubChem CID number | 5462311 | 977
| boron | oxygen CAS number | 7440-42-8 | 7782-44-7 PubChem CID number | 5462311 | 977

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