Input interpretation
krypton (chemical element)
Periodic table location
Periodic table location
Image
Image
Basic elemental properties
![atomic symbol | Kr atomic number | 36 short electronic configuration | [Ar]4s^23d^104p^6 Aufbau diagram | 4p 3d 4s block | p group | 18 period | 4 atomic mass | 83.798 u (unified atomic mass units)](../image_source/cc694a8ed843b8102ae46969f38fb285.png)
atomic symbol | Kr atomic number | 36 short electronic configuration | [Ar]4s^23d^104p^6 Aufbau diagram | 4p 3d 4s block | p group | 18 period | 4 atomic mass | 83.798 u (unified atomic mass units)
Thermodynamic properties
phase at STP | gas melting point | -157.36 °C (rank: 95th) boiling point | -153.22 °C (rank: 87th) critical temperature | 209.41 K (rank: 14th) critical pressure | 5.5 MPa (rank: 14th) molar heat of fusion | 1.64 kJ/mol (rank: 85th) molar heat of vaporization | 9.02 kJ/mol (rank: 87th) specific heat at STP | 248.05 J/(kg K) (rank: 43rd) adiabatic index | 5/3 (rank: 1st) (properties at standard conditions)
Material properties
density | 0.00375 g/cm^3 (rank: 88th) molar volume | 22300 cm^3/mol refractive index | 1.000427 sound speed | 1120 m/s (rank: 64th) thermal conductivity | 0.00943 W/(m K) (rank: 91st) (properties at standard conditions)
Electromagnetic properties
magnetic type | diamagnetic volume magnetic susceptibility | -1.65×10^-8 mass magnetic susceptibility | -4.4×10^-9 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | -3.69×10^-10 m^3/mol (cubic meters per mole) color | (colorless) refractive index | 1.000427
Reactivity
valence | 2 electronegativity | 3 electron affinity | 0 kJ/mol (kilojoules per mole) first ionization energy | 1350.8 kJ/mol (kilojoules per mole) ionization energies | 1350.8 kJ/mol | 2350.4 kJ/mol | 3565 kJ/mol | 5070 kJ/mol | 6240 kJ/mol | 7570 kJ/mol | 10710 kJ/mol | 12138 kJ/mol | 22274 kJ/mol | 25880 kJ/mol | 29700 kJ/mol | 33800 kJ/mol | 37700 kJ/mol | 43100 kJ/mol | 47500 kJ/mol | 52200 kJ/mol | 57100 kJ/mol | 61800 kJ/mol | 75800 kJ/mol | 80400 kJ/mol | 85300 kJ/mol
Reactivity
Atomic properties
term symbol | ^1S_0 atomic radius | 88 pm covalent radius | 116 pm van der Waals radius | 202 pm (electronic ground state properties)
(neutral krypton atomic spectrum)
Abundances
universe abundance | 4×10^-6 mass% (rank: 30th) crust abundance | 1.5×10^-8 mass% (rank: 82nd) ocean abundance | 2.1×10^-8 mass% (rank: 36th) universe molar abundance | 6×10^-8 mol% (rank: 31st) ocean molar abundance | 1.6×10^-9 mol% (rank: 48th) crust molar abundance | 4×10^-9 mol% (rank: 83rd)