|
|
| Krypton | |
| Electron Configuration | 2,8,18,8 |
| Electron Configuration | [Ar] 3d10 4s2 4p6 |
| Ground state | 1S0 |
| Atomic Volume | 38.9 g/cm3 |
| Electronegativity | 3.00 |
| Magnetic ordering | Non-magnetic |
| Mass magnetic susceptibility | -4.4 x 10-9 |
| Molar magnetic susceptibility | -3.69 x 10-10 |
| Speed of sound | gas; 220. liquid; 1120 m s-1 |
 Thermal Properties |
|
| Enthalpy of Atomization | No data. |
| Enthalpy of Fusion | 1.64 kJ mol-1 |
| Enthalpy of Vaporisation | 9.05 kJ mol-1 |
| Heat Capacity | 20.786 J mol-1 K-1 |
| Thermal Conductivity | 9.43 W m-1 K-1 |
| Thermal Expansion | No data. |
| Electrical Properties |
|
| Electrical resistivity | No data. |
| Electrical conductivity | No data. |
| Chemical Properties |
|
| Ionization Potential | |
 First
|
13.999 |
| Second
|
24.359 |
| Third
|
36.95 |
| Optical Properties |
|
| Refractive Index (gas) | 1.000427 |
| Energy Levels |
|
| Kα1 (intensity 100) |
12.649 KeV |
| Kα2 (intensity 50) |
12.598 KeV |
| Kβ1 (intensity 15.5) |
14.112 KeV |
| Kβ2 (intensity 2.4) |
14.3116 KeV |
| Kβ3 (intensity 7.6) |
14.102 KeV |
| Lα1 (intensity 100) |
1.586 KeV |
| Lα2 (intensity 10) |
1.586 KeV |
| Lβ1 (intensity 36.6) |
1.6366 KeV |
| Lβ3 (intensity 3.5) |
1.7107 KeV |
| Lβ4 (intensity 0.2) |
1.697 KeV |
| Lγ3 (intensity 3) |
1.438 KeV |
| Ll (intensity 4.5) |
1.3872 KeV |
| Atomic Radii |
|
| Empirical
|
103 pm |
| Bohr Radius
|
88 pm |
| Covalent Radius
|
110 pm |
| Van der Waals
|
202 pm |
| Triple covalent
|
108 pm |
| Metallic
|
No data. |
| Oxidation States |
|
| Main
|
Kr0, Kr+2 |
| Other
|
|
Ionisation Energies (kJ mol-1)  |
|
| M - M+ |
1350.7 |
| M+ - M2+ |
2350 |
| M2+ - M3+ |
3565 |
| M3+ - M4+ |
5070 |
| M4+ - M5+ |
6240 |
| M5+ - M6+ |
7570 |
| M6+ - M7+ |
10710 |
| M7+ - M8+ |
12200 |
| M8+ - M9+ |
22229 |
| M9+ - M10+ |
28900 |
| Vapour Pressure |
||||||
| P (Pa) | 1 | 10 | 100 | 1K | 10K | 100K |
| T (K) | 59 | 65 | 74 | 84 | 99 | 120 |
| Crystal Structure |
|
| Structure
|
Cubic close packed |
 |
a = 570.6 pm |
| b = 570.6 pm | |
| c = 570.6 pm | |
| α = 90° | |
| β = 90° | |
| γ = 90° | |