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uranium

Input interpretation

uranium (chemical element)
uranium (chemical element)

Periodic table location

Periodic table location
Periodic table location

Image

Image
Image

Basic elemental properties

atomic symbol | U atomic number | 92 short electronic configuration | [Rn]7s^25f^36d^1 Aufbau diagram | 6d 5f 7s block | f period | 7 atomic mass | 238.02891 u (unified atomic mass units) half-life | 4.47 Gyr (gigayears)
atomic symbol | U atomic number | 92 short electronic configuration | [Rn]7s^25f^36d^1 Aufbau diagram | 6d 5f 7s block | f period | 7 atomic mass | 238.02891 u (unified atomic mass units) half-life | 4.47 Gyr (gigayears)

Thermodynamic properties

phase at STP | solid melting point | 1135 °C (rank: 41st) boiling point | 3927 °C (rank: 17th) molar heat of fusion | 14 kJ/mol (rank: 34th) molar heat of vaporization | 420 kJ/mol (rank: 20th) specific heat at STP | 116 J/(kg K) (rank: 84th) (properties at standard conditions)
phase at STP | solid melting point | 1135 °C (rank: 41st) boiling point | 3927 °C (rank: 17th) molar heat of fusion | 14 kJ/mol (rank: 34th) molar heat of vaporization | 420 kJ/mol (rank: 20th) specific heat at STP | 116 J/(kg K) (rank: 84th) (properties at standard conditions)

Material properties

density | 19.05 g/cm^3 (rank: 9th) liquid density | 17.3 g/cm^3 molar volume | 12.495 cm^3/mol Mohs hardness | 6 (≈ microcline) Vickers hardness | 1960 MPa (rank: 8th) Brinell hardness | 2400 MPa (rank: 5th) bulk modulus | 100 GPa (rank: 23rd) shear modulus | 111 GPa Young's modulus | 208 GPa (rank: 11th) Poisson ratio | 0.23 (rank: 47th) sound speed | 3155 m/s (rank: 32nd) thermal expansion | 1.39×10^-5 K^(-1) (rank: 22nd) thermal conductivity | 27 W/(m K) (rank: 45th) (properties at standard conditions)
density | 19.05 g/cm^3 (rank: 9th) liquid density | 17.3 g/cm^3 molar volume | 12.495 cm^3/mol Mohs hardness | 6 (≈ microcline) Vickers hardness | 1960 MPa (rank: 8th) Brinell hardness | 2400 MPa (rank: 5th) bulk modulus | 100 GPa (rank: 23rd) shear modulus | 111 GPa Young's modulus | 208 GPa (rank: 11th) Poisson ratio | 0.23 (rank: 47th) sound speed | 3155 m/s (rank: 32nd) thermal expansion | 1.39×10^-5 K^(-1) (rank: 22nd) thermal conductivity | 27 W/(m K) (rank: 45th) (properties at standard conditions)

Electromagnetic properties

electrical type | conductor resistivity | 2.8×10^-7 Ω m (ohm meters) electrical conductivity | 3.6×10^6 S/m (siemens per meter) magnetic type | paramagnetic volume magnetic susceptibility | 4.11×10^-4 mass magnetic susceptibility | 2.16×10^-8 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 5.14×10^-9 m^3/mol (cubic meters per mole) work function | (3.63 to 3.9) eV threshold frequency | (8.777×10^14 to 9.43×10^14) Hz (hertz) superconducting point | 0.68 K (kelvins) color | (silver) (work function range from 4 different crystalline orientations)
electrical type | conductor resistivity | 2.8×10^-7 Ω m (ohm meters) electrical conductivity | 3.6×10^6 S/m (siemens per meter) magnetic type | paramagnetic volume magnetic susceptibility | 4.11×10^-4 mass magnetic susceptibility | 2.16×10^-8 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 5.14×10^-9 m^3/mol (cubic meters per mole) work function | (3.63 to 3.9) eV threshold frequency | (8.777×10^14 to 9.43×10^14) Hz (hertz) superconducting point | 0.68 K (kelvins) color | (silver) (work function range from 4 different crystalline orientations)

Reactivity

valence | 6 electronegativity | 1.38 first ionization energy | 597.6 kJ/mol (kilojoules per mole) ionization energies | 597.6 kJ/mol | 1420 kJ/mol
valence | 6 electronegativity | 1.38 first ionization energy | 597.6 kJ/mol (kilojoules per mole) ionization energies | 597.6 kJ/mol | 1420 kJ/mol
Reactivity
Reactivity

Atomic properties

term symbol | ^5L_6 atomic radius | 175 pm covalent radius | 196 pm van der Waals radius | 186 pm (electronic ground state properties)
term symbol | ^5L_6 atomic radius | 175 pm covalent radius | 196 pm van der Waals radius | 186 pm (electronic ground state properties)
(neutral uranium atomic spectrum)
(neutral uranium atomic spectrum)

Abundances

universe abundance | 2×10^-8 mass% (rank: 79th) solar abundance | 1×10^-7 mass% (rank: 57th) meteorite abundance | 9.8×10^-7 mass% (rank: 78th) crust abundance | 1.8×10^-4 mass% (rank: 52nd) ocean abundance | 3.3×10^-7 mass% (rank: 25th) human abundance | 1×10^-7 mass% (rank: 39th) universe molar abundance | 1×10^-10 mol% (rank: 78th) solar molar abundance | 4×10^-10 mol% (rank: 70th) meteorite molar abundance | 1×10^-7 mol% (rank: 78th) ocean molar abundance | 8.6×10^-9 mol% (rank: 43rd) crust molar abundance | 1.5×10^-5 mol% (rank: 57th) human molar abundance | 3×10^-9 mol% (rank: 41st)
universe abundance | 2×10^-8 mass% (rank: 79th) solar abundance | 1×10^-7 mass% (rank: 57th) meteorite abundance | 9.8×10^-7 mass% (rank: 78th) crust abundance | 1.8×10^-4 mass% (rank: 52nd) ocean abundance | 3.3×10^-7 mass% (rank: 25th) human abundance | 1×10^-7 mass% (rank: 39th) universe molar abundance | 1×10^-10 mol% (rank: 78th) solar molar abundance | 4×10^-10 mol% (rank: 70th) meteorite molar abundance | 1×10^-7 mol% (rank: 78th) ocean molar abundance | 8.6×10^-9 mol% (rank: 43rd) crust molar abundance | 1.5×10^-5 mol% (rank: 57th) human molar abundance | 3×10^-9 mol% (rank: 41st)

Nuclear properties

half-life | 4.47 Gyr lifetime | 6.45 Gyr (rank: 1st) specific radioactivity | 12.44 kBq/g decay mode | alpha emission nuclear spin | U-217: 1/2^- | U-218: 0^+ | U-219: 9/2^+ | U-220: 0^+ | U-221: 9/2^+ | U-222: 0^+ | U-223: 7/2^+ | U-224: 0^+ | U-225: 5/2^+ | U-226: 0^+ | U-227: 3/2^+ | U-228: 0^+ | U-229: 3/2^+ | U-230: 0^+ | U-231: 5/2^- | U-232: 0^+ | U-233: 5/2^+ | U-234: 0^+ | U-235: 7/2^- | U-236: 0^+ | U-237: 1/2^+ | U-238: 0^+ | U-239: 5/2^+ | U-240: 0^+ | U-241: 7/2^+ | U-242: 0^+ unstable isotopes | U-238 (4.47 Gyr) | U-235 (0.704 Gyr) | U-236 (23.42 Myr) | U-234 (0.2455 Myr) | U-233 (0.1592 Myr) | U-232 (68.8 yr) | U-230 (21 days) | U-237 (6.75 days) | U-231 (100 h) | U-240 (14.1 h) | U-229 (58 min) | U-239 (23.45 min) | U-242 (16.83 min) | U-228 (9.17 min) | U-241 (5 min) | U-227 (66 s) | U-226 (350 ms) | U-225 (84 ms) | U-217 (16 ms) | U-224 (900 µs) | U-218 (510 µs) | U-219 (42 µs) | U-223 (18 µs) | U-222 (1 µs) | U-221 (700 ns) | U-220 (60 ns) neutron cross-section | 7.57 b neutron mass absorption | 5×10^-4 m^2/kg
half-life | 4.47 Gyr lifetime | 6.45 Gyr (rank: 1st) specific radioactivity | 12.44 kBq/g decay mode | alpha emission nuclear spin | U-217: 1/2^- | U-218: 0^+ | U-219: 9/2^+ | U-220: 0^+ | U-221: 9/2^+ | U-222: 0^+ | U-223: 7/2^+ | U-224: 0^+ | U-225: 5/2^+ | U-226: 0^+ | U-227: 3/2^+ | U-228: 0^+ | U-229: 3/2^+ | U-230: 0^+ | U-231: 5/2^- | U-232: 0^+ | U-233: 5/2^+ | U-234: 0^+ | U-235: 7/2^- | U-236: 0^+ | U-237: 1/2^+ | U-238: 0^+ | U-239: 5/2^+ | U-240: 0^+ | U-241: 7/2^+ | U-242: 0^+ unstable isotopes | U-238 (4.47 Gyr) | U-235 (0.704 Gyr) | U-236 (23.42 Myr) | U-234 (0.2455 Myr) | U-233 (0.1592 Myr) | U-232 (68.8 yr) | U-230 (21 days) | U-237 (6.75 days) | U-231 (100 h) | U-240 (14.1 h) | U-229 (58 min) | U-239 (23.45 min) | U-242 (16.83 min) | U-228 (9.17 min) | U-241 (5 min) | U-227 (66 s) | U-226 (350 ms) | U-225 (84 ms) | U-217 (16 ms) | U-224 (900 µs) | U-218 (510 µs) | U-219 (42 µs) | U-223 (18 µs) | U-222 (1 µs) | U-221 (700 ns) | U-220 (60 ns) neutron cross-section | 7.57 b neutron mass absorption | 5×10^-4 m^2/kg

Identifiers

CAS number | 7440-61-1 PubChem CID number | 23989 Gmelin number | 16315
CAS number | 7440-61-1 PubChem CID number | 23989 Gmelin number | 16315

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