Kr
Krypton
Z 36 83.798 g/molNoble Gas
Nucleus
36 Protons
48 Neutrons
36 Electrons (8 Valence)
Shell distribution: K2 • L8 • M18 • N8 • O0 • P0 • Q0
Electron Configuration
Energy
7p
6d
5f
7s
6p
5d
4f
6s
5p
4d
5s
4p
3d
4s
3p
3s
2p
2s
1s
[Ar]3d104s24p6
Radii
Empirical
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Calculated
88 pm0.88 Å
Covalent
116±4 pm1.16±0.04 Å
van Der Waals
202 pm2.02 Å
Oxidation States
CommonRare
0
+2
Crystal Structure
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Face-centered Cubic