Ordnungszahl: |
36 |
Name: |
Krypton |
Namensursprung: |
Greek: kryptos (hidden). |
Entdeckung: |
1898 by Sir William Ramsey, M.W. Travers in Great Britain |
Beschreibung: |
Colorless, odorless, tasteless rare noble gas. |
Vorkommen: |
Forms 1 millionth of the atmosphere. Obtained from production of liquid air. |
Verwendung: |
Used in lighting products. Some is used as inert
filler-gas in incandescent bulbs. Some is mixed with argon in
fluorescent lamps. The most important use is in flashing stroboscopic
lamps that outline airport runways. |
Gruppe: |
Noble Gas |
Atomgewicht: |
83.80 |
Schmelzpunkt: |
-156.6°C |
Siedepunkt: |
-152.3°C |
Dichte bei 293 K: |
0.003708 g/cm³ |
Aggregatszustand bei Raumtemperatur: |
Gas |
Schalen: |
2,8,18,8 |
Orbitale: |
[Ar] 3d10 4s2 4p6 |
Valenzen: |
0 |
1. Ionisierungs- potential: |
13.9996 V |
2. Ionisierungs- potential: |
24.359 V |
3. Ionisierungs- potential: |
36.95 V |
Atomradius: |
1.03 Å |
Spezifische Wärme: |
0.248 J/gK |
Verdampfungswärme: |
9.029 kJ/mol |
Schmelzwärme: |
1.638 kJ/mol |
Thermischer Ausdehnungskoeffizient: |
425 10-6 K-1 |
Röntgenemission Energie / Wellenlänge: |
|
KA |
KB |
LA |
LB |
MA |
MB |
|
|
|
eV |
12633.1 |
14113.3 |
1586.1 |
1636.56 |
0 |
0 |
|
|
|
Å |
0.98143 |
0.8785 |
7.817 |
7.57598 |
0 |
0 |
|
|
|
|
Röntgenabsorption Energie / Wellenlänge: |
|
K |
L-I |
L-II |
L-III |
M-I |
M-II |
M-III |
M-IV |
M-V |
eV |
14326 |
1921 |
1728 |
1675 |
0 |
0 |
0 |
95.04 |
93.83 |
Å |
0.86545 |
6.45421 |
7.17508 |
7.40211 |
0 |
0 |
0 |
130.456 |
132.138 |
|
Röntgen Fluoreszenz Ausbeute: |
|
KA |
KB |
LA |
LB |
MA |
MB |
|
|
|
|
64.6% |
0% |
1.9% |
0% |
0% |
0% |
|
|
|
|
Nuklide: |
|
Anteil |
Gewicht |
Spin |
Halbwertszeit |
Zerfallsmodus |
Kr78 |
0.35% |
77.9204 |
0 |
|
Stable |
Kr79 |
0% |
79 |
1/2 |
1.45d |
EC,β+ |
Kr80 |
2.27% |
79.9164 |
0 |
|
Stable |
Kr81 |
0% |
80.917 |
7/2 |
2.1E05y |
EC |
Kr82 |
11.56% |
81.9135 |
0 |
|
Stable |
Kr83 |
11.55% |
82.9141 |
9/2 |
|
Stable |
Kr83m |
0% |
83 |
1/2 |
1.86h |
IT |
Kr84 |
56.9% |
83.9115 |
0 |
|
Stable |
Kr85 |
0% |
84.913 |
9/2 |
10.73y |
β- |
Kr85m |
0% |
85 |
1/2 |
4.48h |
β-,IT |
Kr86 |
17.37% |
85.9106 |
0 |
|
Stable |
Kr87 |
0% |
87 |
5/2 |
1.27h |
β- |
Kr88 |
0% |
88 |
0 |
2.84h |
β- |
Kr89 |
0% |
89 |
0 |
3.15m |
β- |
Kr90 |
0% |
90 |
0 |
32.3s |
β-,β- | |