Input interpretation
gaseous elements (at STP)
Members
hydrogen | helium | nitrogen | oxygen | fluorine | neon | chlorine | argon | krypton | xenon | radon (total: 11)
Periodic table location
Periodic table location
Images
Images
Basic elemental properties
atomic symbol | all | Ar | Cl | F | H | He | Kr | N | Ne | O | Rn | Xe atomic number | median | 10 | highest | 86 (radon) | lowest | 1 (hydrogen) | distribution | block | all | p | s group | all | 1 | 15 | 16 | 17 | 18 period | all | 1 | 2 | 3 | 4 | 5 | 6 atomic mass | median | 20.1797 u | highest | 222 u (radon) | lowest | 1.008 u (hydrogen) | distribution |
Thermodynamic properties
phase at STP | all | gas melting point | median | -199.7 °C | highest | -71 °C (radon) | lowest | -259.14 °C (hydrogen) | distribution | boiling point | median | -185.8 °C | highest | -34.04 °C (chlorine) | lowest | -268.93 °C (helium) | distribution | critical temperature | median | 150.87 K | highest | 416.9 K (chlorine) | lowest | 5.19 K (helium) | distribution | critical pressure | median | 5.043 MPa | highest | 7.991 MPa (chlorine) | lowest | 0.227 MPa (helium) | distribution | molar heat of fusion | median | 0.558 kJ/mol | highest | 3.2 kJ/mol (chlorine) | lowest | 0.02 kJ/mol (helium) | distribution | molar heat of vaporization | median | 3.41 kJ/mol | highest | 17 kJ/mol (radon) | lowest | 0.083 kJ/mol (helium) | distribution | specific heat at STP | median | 824 J/(kg K) | highest | 14300 J/(kg K) (hydrogen) | lowest | 93.65 J/(kg K) (radon) | distribution | adiabatic index | all | 7/5 | 5/3 (properties at standard conditions)
Material properties
density | median | 0.001696 g/cm^3 | highest | 0.00973 g/cm^3 (radon) | lowest | 8.99×10^-5 g/cm^3 (hydrogen) | distribution | molar volume | median | 22300 cm^3/mol | highest | 22800 cm^3/mol (radon) | lowest | 11030 cm^3/mol (chlorine) | distribution | refractive index | median | 1.000276 | highest | 1.000773 (chlorine) | lowest | 1.000035 (helium) sound speed | median | 936 m/s | highest | 1270 m/s (hydrogen) | lowest | 206 m/s (chlorine) | distribution | thermal conductivity | median | 0.02583 W/(m K) | highest | 0.1805 W/(m K) (hydrogen) | lowest | 0.00361 W/(m K) (radon) (properties at standard conditions)
Electromagnetic properties
volume magnetic susceptibility | median | -6.8×10^-9 | highest | 1.90772×10^-6 (oxygen) | lowest | -2.54×10^-8 (xenon) mass magnetic susceptibility | median | -5.4×10^-9 m^3/kg (cubic meters per kilogram) | highest | 1.335×10^-6 m^3/kg (cubic meters per kilogram) (oxygen) | lowest | -2.48×10^-8 m^3/kg (cubic meters per kilogram) (hydrogen) molar magnetic susceptibility | median | -1.5×10^-10 m^3/mol (cubic meters per mole) | highest | 4.27184×10^-8 m^3/mol (cubic meters per mole) (oxygen) | lowest | -5.65×10^-10 m^3/mol (cubic meters per mole) (xenon) color | all |
Reactivity
valence | median | 2 | highest | 6 (xenon and radon) | lowest | 0 (3 elements) | distribution | electronegativity | median | 3 | highest | 3.98 (fluorine) | lowest | 2.2 (hydrogen) | distribution | electron affinity | median | 0 kJ/mol (kilojoules per mole) | highest | 349 kJ/mol (kilojoules per mole) (chlorine) | lowest | 0 kJ/mol (kilojoules per mole) (6 elements) | distribution | first ionization energy | median | 1350.8 kJ/mol (kilojoules per mole) | highest | 2372.3 kJ/mol (kilojoules per mole) (helium) | lowest | 1037 kJ/mol (kilojoules per mole) (radon) | distribution |
Atomic properties
term symbol | all | ^1S_0 | ^2P_(3/2) | ^2S_(1/2) | ^3P_2 | ^4S_(3/2) atomic radius | median | 65 pm | highest | 120 pm (radon) | lowest | 25 pm (hydrogen) | distribution | covalent radius | median | 71 pm | highest | 150 pm (radon) | lowest | 28 pm (helium) | distribution | van der Waals radius | median | 155 pm | highest | 216 pm (xenon) | lowest | 120 pm (hydrogen) | distribution | (electronic ground state properties)
Abundances
universe abundance | median | 0.06 mass% | highest | 75 mass% (hydrogen) | lowest | 1×10^-6 mass% (xenon) | distribution | solar abundance | median | 0.1 mass% | highest | 75 mass% (hydrogen) | lowest | 5×10^-5 mass% (fluorine) | distribution | meteorite abundance | median | 0.14 mass% | highest | 40 mass% (oxygen) | lowest | 0.0087 mass% (fluorine) crust abundance | median | 0.0011 mass% | highest | 46 mass% (oxygen) | lowest | 2×10^-9 mass% (xenon) ocean abundance | median | 4.5×10^-5 mass% | highest | 86 mass% (oxygen) | lowest | 6×10^-20 mass% (radon) human abundance | median | 2.6 mass% | highest | 61 mass% (oxygen) | lowest | 0.0037 mass% (fluorine) universe molar abundance | median | 0.0043 mol% | highest | 93 mol% (hydrogen) | lowest | 9×10^-9 mol% (xenon) solar molar abundance | median | 0.008 mol% | highest | 93 mol% (hydrogen) | lowest | 3×10^-6 mol% (fluorine) meteorite molar abundance | median | 0.14 mol% | highest | 48 mol% (oxygen) | lowest | 0.0097 mol% (fluorine) ocean molar abundance | median | 7×10^-6 mol% | highest | 66 mol% (hydrogen) | lowest | 2.4×10^-11 mol% (xenon) | distribution | crust molar abundance | median | 0.0015 mol% | highest | 60 mol% (oxygen) | lowest | 3×10^-10 mol% (xenon) human molar abundance | median | 1.2 mol% | highest | 62 mol% (hydrogen) | lowest | 0.0012 mol% (fluorine) | distribution |