hydrogen vs iron vs iodine vs sodium

hydrogen (chemical element) | iron (chemical element) | iodine (chemical element) | sodium (chemical element)

Periodic table location

Images

| atomic symbol | atomic number | short electronic configuration hydrogen | H | 1 | 1s^1 iron | Fe | 26 | [Ar]4s^23d^6 iodine | I | 53 | [Kr]5s^24d^105p^5 sodium | Na | 11 | [Ne]3s^1 | Aufbau diagram | block | group hydrogen | 1s | s | 1 iron | 3d 4s | d | 8 iodine | 5p 4d 5s | p | 17 sodium | 3s | s | 1 | period | atomic mass | half-life hydrogen | 1 | 1.008 u | (stable) iron | 4 | 55.845 u | (stable) iodine | 5 | 126.90447 u | (stable) sodium | 3 | 22.98976928 u | (stable)

phase at STP | all | gas | solid melting point | median | 105.7 °C | highest | 1538 °C (iron) | lowest | -259.14 °C (hydrogen) | distribution | boiling point | median | 534 °C | highest | 2861 °C (iron) | lowest | -252.87 °C (hydrogen) | distribution | critical temperature | median | 819 K | highest | 2573 K (sodium) | lowest | 32.97 K (hydrogen) critical pressure | median | 11.7 MPa | highest | 35 MPa (sodium) | lowest | 1.293 MPa (hydrogen) | distribution | molar heat of fusion | median | 5.18 kJ/mol | highest | 13.8 kJ/mol (iron) | lowest | 0.558 kJ/mol (hydrogen) | distribution | molar heat of vaporization | median | 59.3 kJ/mol | highest | 347 kJ/mol (iron) | lowest | 0.452 kJ/mol (hydrogen) specific heat at STP | median | 840 J/(kg K) | highest | 14300 J/(kg K) (hydrogen) | lowest | 429 J/(kg K) (iodine) (properties at standard conditions)

density | median | 2.954 g/cm^3 | highest | 7.874 g/cm^3 (iron) | lowest | 8.99×10^-5 g/cm^3 (hydrogen) | distribution | molar volume | median | 24.7 cm^3/mol | highest | 11200 cm^3/mol (hydrogen) | lowest | 7.092 cm^3/mol (iron) Vickers hardness | all | 608 MPa Brinell hardness | all | 0.69 MPa | 490 MPa bulk modulus | median | 7.7 GPa | highest | 170 GPa (iron) | lowest | 6.3 GPa (sodium) Poisson ratio | all | 0.29 ultimate tensile strength | all | 10 MPa sound speed | median | 3200 m/s | highest | 4910 m/s (iron) | lowest | 1270 m/s (hydrogen) | distribution | thermal conductivity | median | 40 W/(m K) | highest | 140 W/(m K) (sodium) | lowest | 0.1805 W/(m K) (hydrogen) | distribution | (properties at standard conditions)

resistivity | median | 9.7×10^-8 Ω m (ohm meters) | highest | 1×10^7 Ω m (ohm meters) (iodine) | lowest | 4.7×10^-8 Ω m (ohm meters) (sodium) electrical conductivity | median | 1×10^7 S/m (siemens per meter) | highest | 2.1×10^7 S/m (siemens per meter) (sodium) | lowest | 1×10^-7 S/m (siemens per meter) (iodine) | distribution | volume magnetic susceptibility | median | -2.23×10^-9 | highest | 8.5×10^-6 (sodium) | lowest | -2.22×10^-5 (iodine) | distribution | mass magnetic susceptibility | median | -4.5×10^-9 m^3/kg (cubic meters per kilogram) | highest | 8.8×10^-9 m^3/kg (cubic meters per kilogram) (sodium) | lowest | -2.48×10^-8 m^3/kg (cubic meters per kilogram) (hydrogen) | distribution | molar magnetic susceptibility | median | -4.999×10^-11 m^3/mol (cubic meters per mole) | highest | 2×10^-10 m^3/mol (cubic meters per mole) (sodium) | lowest | -1.14×10^-9 m^3/mol (cubic meters per mole) (iodine) | distribution | work function | all | 2.36 eV | (4.67 to 4.81) eV

valence | median | 2 | highest | 7 (iodine) | lowest | 1 (hydrogen and sodium) | distribution | electronegativity | median | 2.02 | highest | 2.66 (iodine) | lowest | 0.93 (sodium) | distribution | electron affinity | median | 62.8 kJ/mol (kilojoules per mole) | highest | 295.2 kJ/mol (kilojoules per mole) (iodine) | lowest | 15.7 kJ/mol (kilojoules per mole) (iron) first ionization energy | median | 885.4 kJ/mol (kilojoules per mole) | highest | 1312 kJ/mol (kilojoules per mole) (hydrogen) | lowest | 495.8 kJ/mol (kilojoules per mole) (sodium) | distribution |

term symbol | all | ^2P_(3/2) | ^2S_(1/2) | ^5D_4 atomic radius | median | 140 pm | highest | 180 pm (sodium) | lowest | 25 pm (hydrogen) | distribution | covalent radius | median | 136 pm | highest | 166 pm (sodium) | lowest | 31 pm (hydrogen) | distribution | van der Waals radius | median | 198 pm | highest | 227 pm (sodium) | lowest | 120 pm (hydrogen) | distribution | (electronic ground state properties)

universe abundance | median | 0.056 mass% | highest | 75 mass% (hydrogen) | lowest | 1×10^-7 mass% (iodine) solar abundance | median | 0.1 mass% | highest | 75 mass% (hydrogen) | lowest | 0.004 mass% (sodium) meteorite abundance | median | 1.5 mass% | highest | 22 mass% (iron) | lowest | 2.5×10^-5 mass% (iodine) crust abundance | median | 1.2 mass% | highest | 6.3 mass% (iron) | lowest | 4.9×10^-5 mass% (iodine) | distribution | ocean abundance | median | 0.55 mass% | highest | 11 mass% (hydrogen) | lowest | 3×10^-7 mass% (iron) human abundance | median | 0.073 mass% | highest | 10 mass% (hydrogen) | lowest | 2×10^-5 mass% (iodine) universe molar abundance | median | 0.001 mol% | highest | 93 mol% (hydrogen) | lowest | 1×10^-9 mol% (iodine) solar molar abundance | median | 0.003 mol% | highest | 93 mol% (hydrogen) | lowest | 2×10^-4 mol% (sodium) meteorite molar abundance | median | 4.1 mol% | highest | 17 mol% (hydrogen) | lowest | 3×10^-6 mol% (iodine) | distribution | ocean molar abundance | median | 0.15 mol% | highest | 66 mol% (hydrogen) | lowest | 3.3×10^-8 mol% (iron) crust molar abundance | median | 2.2 mol% | highest | 3.1 mol% (hydrogen) | lowest | 8×10^-6 mol% (iodine) | distribution | human molar abundance | median | 0.019 mol% | highest | 62 mol% (hydrogen) | lowest | 1×10^-6 mol% (iodine)