barium vs strontium vs plutonium vs uranium

barium (chemical element) | strontium (chemical element) | plutonium (chemical element) | uranium (chemical element)

Periodic table location

Images

| atomic symbol | atomic number | short electronic configuration barium | Ba | 56 | [Xe]6s^2 strontium | Sr | 38 | [Kr]5s^2 plutonium | Pu | 94 | [Rn]7s^25f^6 uranium | U | 92 | [Rn]7s^25f^36d^1 | Aufbau diagram | block | group barium | 6s | s | 2 strontium | 5s | s | 2 plutonium | 5f 7s | f | uranium | 6d 5f 7s | f | | period | atomic mass | half-life barium | 6 | 137.327 u | (stable) strontium | 5 | 87.62 u | (stable) plutonium | 7 | 244 u | 79 Myr uranium | 7 | 238.02891 u | 4.47 Gyr

phase at STP | all | solid melting point | median | 752 °C | highest | 1135 °C (uranium) | lowest | 640 °C (plutonium) boiling point | median | 2550 °C | highest | 3927 °C (uranium) | lowest | 1382 °C (strontium) molar heat of fusion | median | 8 kJ/mol | highest | 14 kJ/mol (uranium) | lowest | 8 kJ/mol (strontium) molar heat of vaporization | median | 233 kJ/mol | highest | 420 kJ/mol (uranium) | lowest | 137 kJ/mol (strontium) | distribution | specific heat at STP | median | 205 J/(kg K) | highest | 300 J/(kg K) (strontium) | lowest | 116 J/(kg K) (uranium) | distribution | (properties at standard conditions)

density | median | 11.28 g/cm^3 | highest | 19.816 g/cm^3 (plutonium) | lowest | 2.63 g/cm^3 (strontium) liquid density | median | 9.984 g/cm^3 | highest | 17.3 g/cm^3 (uranium) | lowest | 2.375 g/cm^3 (strontium) molar volume | median | 22.91 cm^3/mol | highest | 39.12 cm^3/mol (barium) | lowest | 12.3 cm^3/mol (plutonium) Mohs hardness | median | 1.5 | highest | 6 (≈ microcline) (uranium) | lowest | 1.25 (between talc and gypsum) (barium) Vickers hardness | all | 1960 MPa Brinell hardness | all | 2400 MPa shear modulus | median | 25 GPa | highest | 111 GPa (uranium) | lowest | 4.9 GPa (barium) | distribution | Young's modulus | median | 96 GPa | highest | 208 GPa (uranium) | lowest | 13 GPa (barium) | distribution | Poisson ratio | all | 0.21 | 0.23 | 0.28 ultimate tensile strength | all | 400 MPa sound speed | median | 2260 m/s | highest | 3155 m/s (uranium) | lowest | 1620 m/s (barium) | distribution | thermal expansion | median | 2.06×10^-5 K^(-1) | highest | 2.25×10^-5 K^(-1) (strontium) | lowest | 1.39×10^-5 K^(-1) (uranium) | distribution | thermal conductivity | median | 23 W/(m K) | highest | 35 W/(m K) (strontium) | lowest | 6 W/(m K) (plutonium) | distribution | (properties at standard conditions)

resistivity | median | 3.1×10^-7 Ω m (ohm meters) | highest | 1.5×10^-6 Ω m (ohm meters) (plutonium) | lowest | 1.3×10^-7 Ω m (ohm meters) (strontium) electrical conductivity | median | 3.2×10^6 S/m (siemens per meter) | highest | 7.7×10^6 S/m (siemens per meter) (strontium) | lowest | 670000 S/m (siemens per meter) (plutonium) | distribution | volume magnetic susceptibility | median | 2.25×10^-4 | highest | 6.282×10^-4 (plutonium) | lowest | 3.47×10^-6 (strontium) | distribution | mass magnetic susceptibility | median | 1.65×10^-8 m^3/kg (cubic meters per kilogram) | highest | 3.17×10^-8 m^3/kg (cubic meters per kilogram) (plutonium) | lowest | 1.32×10^-9 m^3/kg (cubic meters per kilogram) (strontium) | distribution | molar magnetic susceptibility | median | 3.35×10^-9 m^3/mol (cubic meters per mole) | highest | 7.735×10^-9 m^3/mol (cubic meters per mole) (plutonium) | lowest | 1.16×10^-10 m^3/mol (cubic meters per mole) (strontium) | distribution | work function | all | 2.52 eV | 2.59 eV | (3.63 to 3.9) eV

valence | median | 4 | highest | 6 (plutonium and uranium) | lowest | 2 (barium and strontium) electronegativity | median | 1.1 | highest | 1.38 (uranium) | lowest | 0.89 (barium) first ionization energy | median | 567.1 kJ/mol (kilojoules per mole) | highest | 597.6 kJ/mol (kilojoules per mole) (uranium) | lowest | 502.9 kJ/mol (kilojoules per mole) (barium) | distribution |

term symbol | all | ^1S_0 | ^5L_6 | ^7F_0 atomic radius | median | 188 pm | highest | 215 pm (barium) | lowest | 175 pm (plutonium and uranium) | distribution | covalent radius | median | 196 pm | highest | 215 pm (barium) | lowest | 187 pm (plutonium) | distribution | (electronic ground state properties)

universe abundance | median | 1×10^-6 mass% | highest | 4×10^-6 mass% (strontium) | lowest | 2×10^-8 mass% (uranium) solar abundance | median | 5.5×10^-7 mass% | highest | 5×10^-6 mass% (strontium) | lowest | 0 mass% (plutonium) meteorite abundance | median | 1.4×10^-4 mass% | highest | 8.7×10^-4 mass% (strontium) | lowest | 0 mass% (plutonium) | distribution | crust abundance | median | 0.017 mass% | highest | 0.036 mass% (strontium) | lowest | 0 mass% (plutonium) ocean abundance | median | 1.7×10^-6 mass% | highest | 8.1×10^-4 mass% (strontium) | lowest | 0 mass% (plutonium) human abundance | median | 1.5×10^-5 mass% | highest | 4.6×10^-4 mass% (strontium) | lowest | 0 mass% (plutonium) universe molar abundance | median | 9×10^-9 mol% | highest | 6×10^-8 mol% (strontium) | lowest | 1×10^-10 mol% (uranium) solar molar abundance | median | 5.1×10^-9 mol% | highest | 7×10^-8 mol% (strontium) | lowest | 0 mol% (plutonium) meteorite molar abundance | median | 2.1×10^-5 mol% | highest | 2×10^-4 mol% (strontium) | lowest | 0 mol% (plutonium) ocean molar abundance | median | 7.4×10^-8 mol% | highest | 5.7×10^-5 mol% (strontium) | lowest | 0 mol% (plutonium) crust molar abundance | median | 0.0026 mol% | highest | 0.0085 mol% (strontium) | lowest | 0 mol% (plutonium) | distribution | human molar abundance | median | 7×10^-7 mol% | highest | 3.3×10^-5 mol% (strontium) | lowest | 0 mol% (plutonium)