handwritten style iodine

iodine (chemical element)

Periodic table location

Image

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)

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)

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)

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)

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

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)

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)

half-life | (stable) stable isotopes | I-127 (100%) nuclear spin | I-108: 1^+ | I-109: 1/2^+ | I-110: 1^+ | I-111: 5/2^+ | I-112: 1^+ | I-113: 5/2^+ | I-114: 1^+ | I-115: 5/2^+ | I-116: 1^+ | I-117: 5/2^+ | I-118: 2^- | I-119: 5/2^+ | I-120: 2^- | I-121: 5/2^+ | I-122: 1^+ | I-123: 5/2^+ | I-124: 2^- | I-125: 5/2^+ | I-126: 2^- | I-127: 5/2^+ | I-128: 1^+ | I-129: 7/2^+ | I-130: 5^+ | I-131: 7/2^+ | I-132: 4^+ | I-133: 7/2^+ | I-134: 4^+ | I-135: 7/2^+ | I-136: 1^- | I-137: 7/2^+ | I-138: 2^- | I-139: 7/2^+ | I-140: 4^- | I-141: 7/2^+ | I-142: 2^- | I-143: 7/2^+ | I-144: 1^- unstable isotopes | I-129 (15.7 Myr) | I-125 (59.4 days) | I-126 (12.93 days) | I-131 (8.0252 days) | I-124 (100.2 h) | I-133 (20.8 h) | I-123 (13.2235 h) | I-130 (12.4 h) | I-135 (6.58 h) | I-132 (137.7 min) | I-121 (127.2 min) | I-120 (82 min) | I-134 (52.5 min) | I-128 (24.98 min) | I-119 (19.1 min) | I-118 (13.7 min) | I-122 (218 s) | I-117 (133 s) | I-136 (83.4 s) | I-115 (78 s) | I-137 (24.5 s) | I-113 (6.6 s) | I-138 (6.23 s) | I-112 (3.42 s) | I-116 (2.91 s) | I-111 (2.5 s) | I-139 (2.28 s) | I-114 (2.1 s) | I-140 (860 ms) | I-110 (650 ms) | I-141 (430 ms) | I-142 (200 ms) | I-108 (36 ms) | I-109 (103 µs) | I-144 (300 ns) | I-143 (150 ns) neutron cross-section | 6.2 b neutron mass absorption | 0.0018 m^2/kg

CAS number | 7553-56-2 PubChem CID number | 807