thallium vs cesium vs erbium

thallium (chemical element) | cesium (chemical element) | erbium (chemical element)

Periodic table location

Images

| thallium | cesium | erbium atomic symbol | Tl | Cs | Er atomic number | 81 | 55 | 68 short electronic configuration | [Xe]6s^24f^145d^106p^1 | [Xe]6s^1 | [Xe]6s^24f^12 Aufbau diagram | 6p 5d 4f 6s | 6s | 4f 6s block | p | s | f group | 13 | 1 | period | 6 | 6 | 6 atomic mass | 204.38 u | 132.90545196 u | 167.259 u half-life | (stable) | (stable) | (stable)

| thallium | cesium | erbium phase at STP | solid | solid | solid melting point | 304 °C | 28.44 °C | 1497 °C boiling point | 1473 °C | 671 °C | 2868 °C critical temperature | | 1938 K | critical pressure | | 9.4 MPa | molar heat of fusion | 4.2 kJ/mol | 2.09 kJ/mol | 19.9 kJ/mol molar heat of vaporization | 165 kJ/mol | 65 kJ/mol | 285 kJ/mol specific heat at STP | 129 J/(kg K) | 242 J/(kg K) | 168 J/(kg K) Néel point | | | 82 K (properties at standard conditions)

| thallium | cesium | erbium density | 11.85 g/cm^3 | 1.879 g/cm^3 | 9.066 g/cm^3 liquid density | 11.22 g/cm^3 | 1.843 g/cm^3 | 8.86 g/cm^3 molar volume | 17.247 cm^3/mol | 70.73 cm^3/mol | 18.45 cm^3/mol Mohs hardness | 1.2 (between talc and gypsum) | 0.2 (between talc and gypsum) | 2 (between gypsum and talc) Vickers hardness | | | 589 MPa Brinell hardness | 26.4 MPa | 0.14 MPa | 814 MPa bulk modulus | 43 GPa | 1.6 GPa | 44 GPa shear modulus | 2.8 GPa | | 28 GPa Young's modulus | 8 GPa | 1.7 GPa | 70 GPa Poisson ratio | 0.45 | | 0.24 tensile yield strength | | | 60 MPa ultimate tensile strength | 7 MPa | | 136 MPa sound speed | 818 m/s | | 2830 m/s thermal expansion | 2.99×10^-5 K^(-1) | | 1.22×10^-5 K^(-1) thermal conductivity | 46 W/(m K) | 36 W/(m K) | 15 W/(m K) (properties at standard conditions)

| thallium | cesium | erbium electrical type | conductor | conductor | conductor resistivity | 1.5×10^-7 Ω m (ohm meters) | 2×10^-7 Ω m (ohm meters) | 8.6×10^-7 Ω m (ohm meters) electrical conductivity | 6.7×10^6 S/m (siemens per meter) | 5×10^6 S/m (siemens per meter) | 1.2×10^6 S/m (siemens per meter) magnetic type | diamagnetic | paramagnetic | paramagnetic volume magnetic susceptibility | -3.56×10^-5 | 5.26×10^-6 | 0.0341788 mass magnetic susceptibility | -3×10^-9 m^3/kg (cubic meters per kilogram) | 2.8×10^-9 m^3/kg (cubic meters per kilogram) | 3.77×10^-6 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | -6.13×10^-10 m^3/mol (cubic meters per mole) | 3.72×10^-10 m^3/mol (cubic meters per mole) | 6.30566×10^-7 m^3/mol (cubic meters per mole) Curie point | | | 32 K (kelvins) Néel point | | | 82 K (kelvins) work function | 3.84 eV (Polycrystalline) | 1.95 eV (Polycrystalline) | threshold frequency | 9.285×10^14 Hz (hertz) | 4.715×10^14 Hz (hertz) | superconducting point | 2.38 K (kelvins) | | color | (silver) | (yellow) | (silver)

| thallium | cesium | erbium valence | 3 | 1 | 3 electronegativity | 1.62 | 0.79 | 1.24 electron affinity | 19.2 kJ/mol (kilojoules per mole) | 45.5 kJ/mol (kilojoules per mole) | 50 kJ/mol (kilojoules per mole) first ionization energy | 589.4 kJ/mol (kilojoules per mole) | 375.7 kJ/mol (kilojoules per mole) | 589.3 kJ/mol (kilojoules per mole) ionization energies | 589.4 kJ/mol | 1971 kJ/mol | 2878 kJ/mol | 375.7 kJ/mol | 2234.3 kJ/mol | 3400 kJ/mol | 589.3 kJ/mol | 1150 kJ/mol | 2194 kJ/mol | 4120 kJ/mol

Reactivity

| thallium | cesium | erbium term symbol | ^2P_(1/2) | ^2S_(1/2) | ^3H_6 atomic radius | 190 pm | 260 pm | 175 pm covalent radius | 145 pm | 244 pm | 189 pm van der Waals radius | 196 pm | | (electronic ground state properties)

| thallium | cesium | erbium universe abundance | 5×10^-8 mass% | 8×10^-8 mass% | 2×10^-7 mass% solar abundance | 1×10^-7 mass% | 8×10^-7 mass% | 1×10^-7 mass% meteorite abundance | 7.8×10^-6 mass% | 1.4×10^-5 mass% | 1.8×10^-5 mass% crust abundance | 5.3×10^-5 mass% | 1.9×10^-4 mass% | 3×10^-4 mass% ocean abundance | 1×10^-10 mass% | 5×10^-8 mass% | 9×10^-11 mass% human abundance | | 2×10^-6 mass% | universe molar abundance | 3×10^-10 mol% | 1×10^-9 mol% | 1×10^-9 mol% solar molar abundance | 9.9×10^-10 mol% | 7×10^-9 mol% | 9.9×10^-10 mol% meteorite molar abundance | 6×10^-7 mol% | 2×10^-6 mol% | 2×10^-6 mol% ocean molar abundance | 3×10^-12 mol% | 2.3×10^-9 mol% | 3.3×10^-12 mol% crust molar abundance | 5×10^-6 mol% | 2.9×10^-5 mol% | 3.7×10^-5 mol% human molar abundance | | 1×10^-7 mol% |

| thallium | cesium | erbium half-life | (stable) | (stable) | (stable) stable isotopes | Tl-205 (70.476%) | Tl-203 (29.524%) | Cs-133 (100%) | Er-166 (33.503%) | ... unstable isotopes | Tl-204 (3.77 yr) | ... | Cs-135 (2.3 Myr) | ... | Er-169 (9.4 days) | ...