Kripton

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Krypton
36Kr
Ar

Kr

Xe
brominekryptonrubidium
Appearance
colorless gas, exhibiting a whitish glow in a high electric field


Spectral lines of krypton
General properties
Name, simbolo, kaiphan krypton, Kr, 36
Pronunciation Plantilya:IPAc-en Plantilya:Respell
Element category gas nga halangdon
Group, period, block 184, p
Standard atomic weight 83.798
Electron configuration [Ar] 3d10 4s2 4p6
2, 8, 18, 8
Electron shells of krypton (2, 8, 18, 8)
History
Discovery William Ramsay and Morris Travers (1898)
First isolation William Ramsay and Morris Travers (1898)
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 115.79 K, -157.36 °C, -251.25 °F
Boiling point 119.93 K, -153.22 °C, -244.12 °F
Triple point 115.775 K (-157°C), 73.2 kPa
Critical point 209.41 K, 5.50 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[2]
Thermal conductivity 9.43×10-3  W·m−1·K−1
Speed of sound (gas, 23 °C) 220, (liquid) 1120 m·s−1
CAS registry number 7439-90-9
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% 86Kr is stable with 50 neutrons
t  h  u
· r

Ang kripton (Iningles krypton) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Kr ug kaiphan nga atomik 36. Ang kripton mao ang gas nga halangdon.

Ang mga gi basihan niini[usba | edit source]

  1. Krypton. encyclopedia.airliquide.com
  2. 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. 


Galeriya sa hulagway[usba | edit source]