Template:Infobox krypton

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Krypton
36Kr
Hydrogen (diatomic nonmetal)
Helium (noble gas)
Lithium (alkali metal)
Beryllium (alkaline earth metal)
Boron (metalloid)
Carbon (polyatomic nonmetal)
Nitrogen (diatomic nonmetal)
Oxygen (diatomic nonmetal)
Fluorine (diatomic nonmetal)
Neon (noble gas)
Sodium (alkali metal)
Magnesium (alkaline earth metal)
Aluminium (other metals)
Silicon (metalloid)
Phosphorus (polyatomic nonmetal)
Sulfur (polyatomic nonmetal)
Chlorine (diatomic nonmetal)
Argon (noble gas)
Potassium (alkali metal)
Calcium (alkaline earth metal)
Scandium (transition metal)
Titanium (transition metal)
Vanadium (transition metal)
Chromium (transition metal)
Manganese (transition metal)
Iron (transition metal)
Cobalt (transition metal)
Nickel (transition metal)
Copper (transition metal)
Zinc (transition metal)
Gallium (other metals)
Germanium (metalloid)
Arsenic (metalloid)
Selenium (polyatomic nonmetal)
Bromine (diatomic nonmetal)
Krypton (noble gas)
Rubidium (alkali metal)
Strontium (alkaline earth metal)
Yttrium (transition metal)
Zirconium (transition metal)
Niobium (transition metal)
Molybdenum (transition metal)
Technetium (transition metal)
Ruthenium (transition metal)
Rhodium (transition metal)
Palladium (transition metal)
Silver (transition metal)
Cadmium (transition metal)
Indium (other metals)
Tin (other metals)
Antimony (metalloid)
Tellurium (metalloid)
Iodine (diatomic nonmetal)
Xenon (noble gas)
Caesium (alkali metal)
Barium (alkaline earth metal)
Lanthanum (lanthanide)
Cerium (lanthanide)
Praseodymium (lanthanide)
Neodymium (lanthanide)
Promethium (lanthanide)
Samarium (lanthanide)
Europium (lanthanide)
Gadolinium (lanthanide)
Terbium (lanthanide)
Dysprosium (lanthanide)
Holmium (lanthanide)
Erbium (lanthanide)
Thulium (lanthanide)
Ytterbium (lanthanide)
Lutetium (lanthanide)
Hafnium (transition metal)
Tantalum (transition metal)
Tungsten (transition metal)
Rhenium (transition metal)
Osmium (transition metal)
Iridium (transition metal)
Platinum (transition metal)
Gold (transition metal)
Mercury (transition metal)
Thallium (other metals)
Lead (other metals)
Bismuth (other metals)
Polonium (other metals)
Astatine (metalloid)
Radon (noble gas)
Francium (alkali metal)
Radium (alkaline earth metal)
Actinium (actinide)
Thorium (actinide)
Protactinium (actinide)
Uranium (actinide)
Neptunium (actinide)
Plutonium (actinide)
Americium (actinide)
Curium (actinide)
Berkelium (actinide)
Californium (actinide)
Einsteinium (actinide)
Fermium (actinide)
Mendelevium (actinide)
Nobelium (actinide)
Lawrencium (actinide)
Rutherfordium (transition metal)
Dubnium (transition metal)
Seaborgium (transition metal)
Bohrium (transition metal)
Hassium (transition metal)
Meitnerium (unknown chemical properties)
Darmstadtium (unknown chemical properties)
Roentgenium (unknown chemical properties)
Copernicium (transition metal)
Ununtrium (unknown chemical properties)
Flerovium (unknown chemical properties)
Ununpentium (unknown chemical properties)
Livermorium (unknown chemical properties)
Ununseptium (unknown chemical properties)
Ununoctium (unknown chemical properties)
Ar

Kr

Xe
brominekryptonrubidium
Krypton in the periodic table
Appearance
colorless gas, exhibiting a whitish glow in a high electric field


Spectral lines of krypton
General properties
Name, symbol, number krypton, Kr, 36
Pronunciation /ˈkrɪptɒn/ KRIP-ton
Element category noble gases
Group, period, block 18 (noble gases), 4, p
Standard atomic weight 83.798
Electron configuration [Ar] 3d10 4s2 4p6
2, 8, 18, 8
Physical properties
Phase gas
Density (0 °C, 101.325 kPa)
3.749 g/L
Liquid density at b.p. 2.413[1] g·cm−3
Melting point 115.78 K, -157.37 °C, -251.27 °F
Boiling point 119.93 K, -153.415 °C, -244.147 °F
Triple point 115.775 K, 73.53[2] kPa
Critical point 209.48 K, 5.525[2] MPa
Heat of fusion 1.64 kJ·mol−1
Heat of vaporization 9.08 kJ·mol−1
Molar heat capacity 5R/2 = 20.786 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 59 65 74 84 99 120
Atomic properties
Oxidation states 2, 1, 0
Electronegativity 3.00 (Pauling scale)
Ionization energies 1st: 1350.8 kJ·mol−1
2nd: 2350.4 kJ·mol−1
3rd: 3565 kJ·mol−1
Covalent radius 116±4 pm
Van der Waals radius 202 pm
Miscellanea
Crystal structure cubic face-centered
Krypton has a cubic face-centered crystal structure
Magnetic ordering diamagnetic[3]
Thermal conductivity 9.43×10-3  W·m−1·K−1
Speed of sound (gas, 23 °C) 220 m·s−1
(liquid) 1120 m·s−1
CAS registry number 7439-90-9
History
Discovery William Ramsay and Morris Travers (1898)
First isolation William Ramsay and Morris Travers (1898)
Most stable isotopes
Main article: Isotopes of krypton
iso NA half-life DM DE (MeV) DP
78Kr 0.35% >1.1×1020 y (β+β+) 2.846 78Se
79Kr syn 35.04 h ε - 79Br
β+ 0.604 79Br
γ 0.26, 0.39, 0.60 -
80Kr 2.25% 80Kr is stable with 44 neutrons
81Kr trace 2.29×105 y ε - 81Br
γ 0.281 -
82Kr 11.6% 82Kr is stable with 46 neutrons
83Kr 11.5% 83Kr is stable with 47 neutrons
84Kr 57.0% 84Kr is stable with 48 neutrons
85Kr syn 10.756 y β 0.687 85Rb
86Kr 17.3% - (ββ) 1.2556 86Sr
Decay modes in parentheses are predicted, but have not yet been observed
· references

References

  1. ^ Krypton. encyclopedia.airliquide.com
  2. ^ a b Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.121. ISBN 1439855110. 
  3. ^ Magnetic susceptibility of the elements and inorganic compounds, in Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.