Krypton

Symbol KrAtomic number 36
Atomic mass
83.80
 Thermal conductivity
0.00009
Atomic radius
1.03
 Covalent radius
1.12
Density
0.00374
 Atomic volume
38.9
Melting point
116.6
 Oxidation states
...
Boiling point
119.80
 Stable isotopes
6
Heat of vapor.
9.029
 Electronegativity
...
Heat of fusion
1.638
 First ionization
13.999
Specific heat
0.248
 Electrical conduct.
...
Electron configuration
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Krypton

Krypton is a noble gas which is found in the atmosphere in trace quantities.

While it has not found much practical use, it's spectrum has been used as a standard for length measurement.


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Krypton Nuclear Data

Z
A
Atomic
Mass (u)
Nuclear
Mass(GeV/c2
Binding
Energy(MeV)
Spin
Natural
Abund.
Half-life
Decay
Q
MeV
36
78
77.920396
72.5646
675.56
0
0.0035
stable
...
...
36
80
79.916380
74.4238
695.44
0
0.0225
stable
...
...
36
81
80.916590
75.3555
703.32
7/2
...
0.21My
EC
0.28
36
82
81.913483
76.2841
714.28
0
0.116
stable
...
...
36
83
82.914135
77.2163
721.75
9/2
0.115
stable
...
...
36
84
83.911507
78.1453
732.27
0
0.57
stable
...
...
36
85
84.912532
79.0778
739.38
9/2
...
10.72y
b-
0.69
36
86
85.910615
80.0075
749.24
0
0.173
stable
...
...
36
90
89.919528
83.7418
773.23
0
...
32.3s
b-
4.39
36
92
91.926270
85.6111
783.09
0
...
1.84s
b-
6.06

 This is an example of how the relative abundances of isotopes are determined. The mass spectrograph uses a magnetic field to bend charged ions of the material into circles with diameters dependent upon the mass. It then can measure the current as a function of distance to determine the relative abundances of the isotopes.
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