Input interpretation
iodine (chemical element)
Periodic table location
Periodic table location
Image
Image
Basic elemental properties
atomic symbol | I atomic number | 53 short electronic configuration | [Kr]5s^24d^105p^5 Aufbau diagram | 5p 4d 5s block | p group | 17 period | 5 atomic mass | 126.90447 u (unified atomic mass units)
Thermodynamic properties
phase at STP | solid melting point | 113.7 °C (rank: 83rd) boiling point | 184.3 °C (rank: 82nd) critical temperature | 819 K (rank: 9th) critical pressure | 11.7 MPa (rank: 8th) molar heat of fusion | 7.76 kJ/mol (rank: 55th) molar heat of vaporization | 20.9 kJ/mol (rank: 80th) specific heat at STP | 429 J/(kg K) (rank: 29th) (properties at standard conditions)
Material properties
density | 4.94 g/cm^3 (rank: 64th) molar volume | 25.69 cm^3/mol bulk modulus | 7.7 GPa (rank: 62nd) thermal conductivity | 0.449 W/(m K) (rank: 80th) (properties at standard conditions)
Electromagnetic properties
electrical type | insulator resistivity | 1×10^7 Ω m (ohm meters) electrical conductivity | 1×10^-7 S/m (siemens per meter) magnetic type | diamagnetic volume magnetic susceptibility | -2.22×10^-5 mass magnetic susceptibility | -4.5×10^-9 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | -1.14×10^-9 m^3/mol (cubic meters per mole) color | (slate gray)
Reactivity
valence | 7 electronegativity | 2.66 electron affinity | 295.2 kJ/mol (kilojoules per mole) first ionization energy | 1008.4 kJ/mol (kilojoules per mole) ionization energies | 1008.4 kJ/mol | 1845.9 kJ/mol | 3180 kJ/mol
Reactivity
Atomic properties
term symbol | ^2P_(3/2) atomic radius | 140 pm covalent radius | 139 pm van der Waals radius | 198 pm (electronic ground state properties)
(neutral iodine atomic spectrum)
Abundances
universe abundance | 1×10^-7 mass% (rank: 61st) meteorite abundance | 2.5×10^-5 mass% (rank: 52nd) crust abundance | 4.9×10^-5 mass% (rank: 62nd) ocean abundance | 6×10^-6 mass% (rank: 20th) human abundance | 2×10^-5 mass% (rank: 25th) universe molar abundance | 1×10^-9 mol% (rank: 59th) meteorite molar abundance | 3×10^-6 mol% (rank: 55th) ocean molar abundance | 2.9×10^-7 mol% (rank: 31st) crust molar abundance | 8×10^-6 mol% (rank: 61st) human molar abundance | 1×10^-6 mol% (rank: 30th)