thallium vs iodine vs lead

thallium (chemical element) | iodine (chemical element) | lead (chemical element)

Periodic table location

Images

| thallium | iodine | lead atomic symbol | Tl | I | Pb atomic number | 81 | 53 | 82 short electronic configuration | [Xe]6s^24f^145d^106p^1 | [Kr]5s^24d^105p^5 | [Xe]6s^24f^145d^106p^2 Aufbau diagram | 6p 5d 4f 6s | 5p 4d 5s | 6p 5d 4f 6s block | p | p | p group | 13 | 17 | 14 period | 6 | 5 | 6 atomic mass | 204.38 u | 126.90447 u | 207.2 u half-life | (stable) | (stable) | (stable)

| thallium | iodine | lead phase at STP | solid | solid | solid melting point | 304 °C | 113.7 °C | 327.46 °C boiling point | 1473 °C | 184.3 °C | 1749 °C critical temperature | | 819 K | critical pressure | | 11.7 MPa | molar heat of fusion | 4.2 kJ/mol | 7.76 kJ/mol | 4.77 kJ/mol molar heat of vaporization | 165 kJ/mol | 20.9 kJ/mol | 178 kJ/mol specific heat at STP | 129 J/(kg K) | 429 J/(kg K) | 127 J/(kg K) (properties at standard conditions)

| thallium | iodine | lead density | 11.85 g/cm^3 | 4.94 g/cm^3 | 11.34 g/cm^3 liquid density | 11.22 g/cm^3 | | 10.66 g/cm^3 molar volume | 17.247 cm^3/mol | 25.69 cm^3/mol | 18.27 cm^3/mol Mohs hardness | 1.2 (between talc and gypsum) | | 1.5 (between talc and gypsum) Brinell hardness | 26.4 MPa | | 38.3 MPa bulk modulus | 43 GPa | 7.7 GPa | 46 GPa shear modulus | 2.8 GPa | | 5.6 GPa Young's modulus | 8 GPa | | 16 GPa Poisson ratio | 0.45 | | 0.44 ultimate tensile strength | 7 MPa | | 18 MPa sound speed | 818 m/s | | 1260 m/s thermal expansion | 2.99×10^-5 K^(-1) | | 2.89×10^-5 K^(-1) thermal conductivity | 46 W/(m K) | 0.449 W/(m K) | 35 W/(m K) (properties at standard conditions)

| thallium | iodine | lead electrical type | conductor | insulator | conductor resistivity | 1.5×10^-7 Ω m (ohm meters) | 1×10^7 Ω m (ohm meters) | 2.1×10^-7 Ω m (ohm meters) electrical conductivity | 6.7×10^6 S/m (siemens per meter) | 1×10^-7 S/m (siemens per meter) | 4.8×10^6 S/m (siemens per meter) magnetic type | diamagnetic | diamagnetic | diamagnetic volume magnetic susceptibility | -3.56×10^-5 | -2.22×10^-5 | -1.7×10^-5 mass magnetic susceptibility | -3×10^-9 m^3/kg (cubic meters per kilogram) | -4.5×10^-9 m^3/kg (cubic meters per kilogram) | -1.5×10^-9 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | -6.13×10^-10 m^3/mol (cubic meters per mole) | -1.14×10^-9 m^3/mol (cubic meters per mole) | -3.11×10^-10 m^3/mol (cubic meters per mole) work function | 3.84 eV (Polycrystalline) | | 4.25 eV (Polycrystalline) threshold frequency | 9.285×10^14 Hz (hertz) | | 1.028×10^15 Hz (hertz) superconducting point | 2.38 K (kelvins) | | 7.2 K (kelvins) color | (silver) | (slate gray) | (slate gray)

| thallium | iodine | lead valence | 3 | 7 | 4 electronegativity | 1.62 | 2.66 | 2.33 electron affinity | 19.2 kJ/mol (kilojoules per mole) | 295.2 kJ/mol (kilojoules per mole) | 35.1 kJ/mol (kilojoules per mole) first ionization energy | 589.4 kJ/mol (kilojoules per mole) | 1008.4 kJ/mol (kilojoules per mole) | 715.6 kJ/mol (kilojoules per mole) ionization energies | 589.4 kJ/mol | 1971 kJ/mol | 2878 kJ/mol | 1008.4 kJ/mol | 1845.9 kJ/mol | 3180 kJ/mol | 715.6 kJ/mol | 1450.5 kJ/mol | 3081.5 kJ/mol | 4083 kJ/mol | 6640 kJ/mol

Reactivity

| thallium | iodine | lead term symbol | ^2P_(1/2) | ^2P_(3/2) | ^3P_0 atomic radius | 190 pm | 140 pm | 180 pm covalent radius | 145 pm | 139 pm | 146 pm van der Waals radius | 196 pm | 198 pm | 202 pm (electronic ground state properties)

| thallium | iodine | lead universe abundance | 5×10^-8 mass% | 1×10^-7 mass% | 1×10^-6 mass% solar abundance | 1×10^-7 mass% | | 1×10^-6 mass% meteorite abundance | 7.8×10^-6 mass% | 2.5×10^-5 mass% | 1.4×10^-4 mass% crust abundance | 5.3×10^-5 mass% | 4.9×10^-5 mass% | 9.9×10^-4 mass% ocean abundance | 1×10^-10 mass% | 6×10^-6 mass% | 3×10^-9 mass% human abundance | | 2×10^-5 mass% | 1.7×10^-4 mass% universe molar abundance | 3×10^-10 mol% | 1×10^-9 mol% | 6×10^-9 mol% solar molar abundance | 9.9×10^-10 mol% | | 7×10^-9 mol% meteorite molar abundance | 6×10^-7 mol% | 3×10^-6 mol% | 1×10^-5 mol% ocean molar abundance | 3×10^-12 mol% | 2.9×10^-7 mol% | 9×10^-11 mol% crust molar abundance | 5×10^-6 mol% | 8×10^-6 mol% | 9.9×10^-5 mol% human molar abundance | | 1×10^-6 mol% | 5×10^-6 mol%