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.
Quick facts Krypton, Panagway ...
| Krypton |
|---|
36Kr |
|
|
| Panagway |
colorless gas, exhibiting a whitish glow in a high electric field
Spectral lines of krypton |
| Kinatibuk-ang mga kinaiya |
| Ngalan, simbolo, kaiphan |
krypton, Kr, 36 |
| Paglitok |
[[Help:Pronunciation respelling key|Plantilya:Smallcaps all-ton]] |
| Kategoriyang elemento |
gas nga halangdon |
| Group, period, block |
18, 4, p |
| Gibug-aton sa atomo |
83.798 |
| Kontorno sa elektron |
[Ar] 3d10 4s2 4p6
2, 8, 18, 8
 Electron shells of krypton (2, 8, 18, 8) |
| History |
| Pagkadiskobre |
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
|
| 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 |
|
| · r |
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