sodium, niobium, platinum

sodium (chemical element) | niobium (chemical element) | platinum (chemical element)

Periodic table location

Images

| sodium | niobium | platinum atomic symbol | Na | Nb | Pt atomic number | 11 | 41 | 78 short electronic configuration | [Ne]3s^1 | [Kr]5s^14d^4 | [Xe]6s^14f^145d^9 Aufbau diagram | 3s | 4d 5s | 5d 4f 6s block | s | d | d group | 1 | 5 | 10 period | 3 | 5 | 6 atomic mass | 22.98976928 u | 92.90637 u | 195.084 u half-life | (stable) | (stable) | (stable)

| sodium | niobium | platinum phase at STP | solid | solid | solid melting point | 97.72 °C | 2477 °C | 1768.3 °C boiling point | 883 °C | 4744 °C | 3825 °C critical temperature | 2573 K | | critical pressure | 35 MPa | | molar heat of fusion | 2.6 kJ/mol | 26.8 kJ/mol | 20 kJ/mol molar heat of vaporization | 97.7 kJ/mol | 690 kJ/mol | 490 kJ/mol specific heat at STP | 1230 J/(kg K) | 265 J/(kg K) | 133 J/(kg K) (properties at standard conditions)

| sodium | niobium | platinum density | 0.968 g/cm^3 | 8.57 g/cm^3 | 21.45 g/cm^3 liquid density | 0.927 g/cm^3 | | 19.77 g/cm^3 molar volume | 23.7 cm^3/mol | 10.84 cm^3/mol | 9.095 cm^3/mol Mohs hardness | 0.5 (between talc and gypsum) | 6 (≈ microcline) | 3.5 (between calcite and fluorite) Vickers hardness | | 1320 MPa | 549 MPa Brinell hardness | 0.69 MPa | 736 MPa | 392 MPa bulk modulus | 6.3 GPa | 170 GPa | 230 GPa shear modulus | 3.3 GPa | 38 GPa | 61 GPa Young's modulus | 10 GPa | 105 GPa | 168 GPa Poisson ratio | | 0.4 | 0.38 ultimate tensile strength | 10 MPa | | sound speed | 3200 m/s | 3480 m/s | 2680 m/s thermal expansion | 7.1×10^-5 K^(-1) | 7.3×10^-6 K^(-1) | 8.8×10^-6 K^(-1) thermal conductivity | 140 W/(m K) | 54 W/(m K) | 72 W/(m K) (properties at standard conditions)

| sodium | niobium | platinum electrical type | conductor | conductor | conductor resistivity | 4.7×10^-8 Ω m (ohm meters) | 1.5×10^-7 Ω m (ohm meters) | 1.1×10^-7 Ω m (ohm meters) electrical conductivity | 2.1×10^7 S/m (siemens per meter) | 6.7×10^6 S/m (siemens per meter) | 9.4×10^6 S/m (siemens per meter) magnetic type | paramagnetic | paramagnetic | paramagnetic volume magnetic susceptibility | 8.5×10^-6 | 2.37×10^-4 | 2.573×10^-4 mass magnetic susceptibility | 8.8×10^-9 m^3/kg (cubic meters per kilogram) | 2.76×10^-8 m^3/kg (cubic meters per kilogram) | 1.22×10^-8 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 2×10^-10 m^3/mol (cubic meters per mole) | 2.56×10^-9 m^3/mol (cubic meters per mole) | 2.38×10^-9 m^3/mol (cubic meters per mole) work function | 2.36 eV (Polycrystalline) | (3.95 to 4.87) eV | (5.12 to 5.93) eV threshold frequency | 5.706×10^14 Hz (hertz) | (9.551×10^14 to 1.178×10^15) Hz (hertz) | (1.238×10^15 to 1.434×10^15) Hz (hertz) superconducting point | | 9.25 K (kelvins) | color | (silver) | (gray) | (gray)

| sodium | niobium | platinum valence | 1 | 5 | 6 electronegativity | 0.93 | 1.6 | 2.28 electron affinity | 52.8 kJ/mol (kilojoules per mole) | 86.1 kJ/mol (kilojoules per mole) | 205.3 kJ/mol (kilojoules per mole) first ionization energy | 495.8 kJ/mol (kilojoules per mole) | 652.1 kJ/mol (kilojoules per mole) | 870 kJ/mol (kilojoules per mole) ionization energies | 495.8 kJ/mol | 4562 kJ/mol | 6910.3 kJ/mol | 9543 kJ/mol | 13354 kJ/mol | 16613 kJ/mol | 20117 kJ/mol | 25496 kJ/mol | 28932 kJ/mol | 141362 kJ/mol | 652.1 kJ/mol | 1380 kJ/mol | 2416 kJ/mol | 3700 kJ/mol | 4877 kJ/mol | 9847 kJ/mol | 12100 kJ/mol | 870 kJ/mol | 1791 kJ/mol

Reactivity

| sodium | niobium | platinum term symbol | ^2S_(1/2) | ^6D_(1/2) | ^3D_3 atomic radius | 180 pm | 145 pm | 135 pm covalent radius | 166 pm | 164 pm | 136 pm van der Waals radius | 227 pm | | 175 pm (electronic ground state properties)

| sodium | niobium | platinum universe abundance | 0.002 mass% | 2×10^-7 mass% | 5×10^-7 mass% solar abundance | 0.004 mass% | 4×10^-7 mass% | 9×10^-7 mass% meteorite abundance | 0.55 mass% | 1.9×10^-5 mass% | 9.8×10^-5 mass% crust abundance | 2.3 mass% | 0.0017 mass% | 3.7×10^-6 mass% ocean abundance | 1.1 mass% | 1×10^-10 mass% | human abundance | 0.14 mass% | | universe molar abundance | 1×10^-4 mol% | 0 mol% | 3×10^-9 mol% solar molar abundance | 2×10^-4 mol% | 5×10^-9 mol% | 6×10^-9 mol% meteorite molar abundance | 0.48 mol% | 3×10^-6 mol% | 1×10^-5 mol% ocean molar abundance | 0.3 mol% | 6.7×10^-12 mol% | crust molar abundance | 2.1 mol% | 3.7×10^-4 mol% | 4×10^-7 mol% human molar abundance | 0.038 mol% | |