barium vs strontium vs plutonium

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

Periodic table location

Images

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

| barium | strontium | plutonium phase at STP | solid | solid | solid melting point | 727 °C | 777 °C | 640 °C boiling point | 1870 °C | 1382 °C | 3230 °C molar heat of fusion | 8 kJ/mol | 8 kJ/mol | (unknown) molar heat of vaporization | 140 kJ/mol | 137 kJ/mol | 325 kJ/mol specific heat at STP | 205 J/(kg K) | 300 J/(kg K) | (properties at standard conditions)

| barium | strontium | plutonium density | 3.51 g/cm^3 | 2.63 g/cm^3 | 19.816 g/cm^3 liquid density | 3.338 g/cm^3 | 2.375 g/cm^3 | 16.63 g/cm^3 molar volume | 39.12 cm^3/mol | 33.32 cm^3/mol | 12.3 cm^3/mol Mohs hardness | 1.25 (between talc and gypsum) | 1.5 (between talc and gypsum) | (unknown) bulk modulus | 9.6 GPa | | (unknown) shear modulus | 4.9 GPa | 6.1 GPa | 43 GPa Young's modulus | 13 GPa | | 96 GPa Poisson ratio | | 0.28 | 0.21 tensile yield strength | | | 275 MPa ultimate tensile strength | | | 400 MPa sound speed | 1620 m/s | | 2260 m/s thermal expansion | 2.06×10^-5 K^(-1) | 2.25×10^-5 K^(-1) | (unknown) thermal conductivity | 18 W/(m K) | 35 W/(m K) | 6 W/(m K) (properties at standard conditions)

| barium | strontium | plutonium electrical type | conductor | conductor | conductor resistivity | 3.5×10^-7 Ω m (ohm meters) | 1.3×10^-7 Ω m (ohm meters) | 1.5×10^-6 Ω m (ohm meters) electrical conductivity | 2.9×10^6 S/m (siemens per meter) | 7.7×10^6 S/m (siemens per meter) | 670000 S/m (siemens per meter) magnetic type | paramagnetic | paramagnetic | paramagnetic volume magnetic susceptibility | 3.966×10^-5 | 3.47×10^-6 | 6.282×10^-4 mass magnetic susceptibility | 1.13×10^-8 m^3/kg (cubic meters per kilogram) | 1.32×10^-9 m^3/kg (cubic meters per kilogram) | 3.17×10^-8 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 1.552×10^-9 m^3/mol (cubic meters per mole) | 1.16×10^-10 m^3/mol (cubic meters per mole) | 7.735×10^-9 m^3/mol (cubic meters per mole) work function | 2.52 eV (Polycrystalline) | 2.59 eV (Polycrystalline) | threshold frequency | 6.093×10^14 Hz (hertz) | 6.263×10^14 Hz (hertz) | color | (silver) | (silver) | (silver)

| barium | strontium | plutonium valence | 2 | 2 | 6 electronegativity | 0.89 | 0.95 | 1.28 electron affinity | 13.95 kJ/mol (kilojoules per mole) | 5.03 kJ/mol (kilojoules per mole) | (unknown) first ionization energy | 502.9 kJ/mol (kilojoules per mole) | 549.5 kJ/mol (kilojoules per mole) | 584.7 kJ/mol (kilojoules per mole) ionization energies | 502.9 kJ/mol | 965.2 kJ/mol | 3600 kJ/mol | 549.5 kJ/mol | 1064.2 kJ/mol | 4138 kJ/mol | 5500 kJ/mol | 6910 kJ/mol | 8760 kJ/mol | 10230 kJ/mol | 11800 kJ/mol | 15600 kJ/mol | 17100 kJ/mol | 584.7 kJ/mol

Reactivity

| barium | strontium | plutonium term symbol | ^1S_0 | ^1S_0 | ^7F_0 atomic radius | 215 pm | 200 pm | 175 pm covalent radius | 215 pm | 195 pm | 187 pm (electronic ground state properties)

| barium | strontium | plutonium universe abundance | 1×10^-6 mass% | 4×10^-6 mass% | solar abundance | 1×10^-6 mass% | 5×10^-6 mass% | 0 mass% meteorite abundance | 2.7×10^-4 mass% | 8.7×10^-4 mass% | 0 mass% crust abundance | 0.034 mass% | 0.036 mass% | 0 mass% ocean abundance | 3×10^-6 mass% | 8.1×10^-4 mass% | 0 mass% human abundance | 3×10^-5 mass% | 4.6×10^-4 mass% | 0 mass% universe molar abundance | 9×10^-9 mol% | 6×10^-8 mol% | solar molar abundance | 9.9×10^-9 mol% | 7×10^-8 mol% | 0 mol% meteorite molar abundance | 4.1×10^-5 mol% | 2×10^-4 mol% | 0 mol% ocean molar abundance | 1.4×10^-7 mol% | 5.7×10^-5 mol% | 0 mol% crust molar abundance | 0.0051 mol% | 0.0085 mol% | 0 mol% human molar abundance | 1.4×10^-6 mol% | 3.3×10^-5 mol% | 0 mol%