 |
| General |
| Name | Krypton |
| Symbol | Kr |
| Number | 36 |
| Group Number | 18 |
| Group | Noble Gas |
| Block | p |
| Density | 0.003708 g/cm3 |
| Atomic Weight | 83.80 g/mol |
| Atomic Volume | 38.9 cm3/mol |
| Discover | 1898 |
|
| States |
| State | Gas |
| Melting Point | 115.79 K |
| Boiling Point | 119.93 K |
| Triple Point | 115.775 K |
| Critical Point | 209.41 K |
| Heat of Fusion | 1.64 kJ/mol |
| Heat of Vaporization | 9.08 kJ/mol |
|
| Energies |
| First Ionization Energy | 1350.7 kJ/mole |
| Second Ionization Energy | 2350.3 kJ/mole |
| Third Ionization Energy | 3565.1 kJ/mole |
| Electronegativity | 3 |
| Electron Affinity | Nil |
| Specific Heat | 0.248 J/gK |
| Heat Atomization | 0 kJ/mole atoms |
|
| Oxidation and Electrons |
| Shells | 2,8,18,8 |
| Electron Configuration | [Ar] 3d10 4s2 4p6 |
| Minimum Oxidation Number | 0 |
| Maximum Oxidation Number | 2 |
| Minimum Common Oxidation Number | 0 |
| Maximum Common Oxidation Number | 2 |
|
| Appearance and Characteristics |
| Crystal Structure | cubic face centered |
| Characteristics | unreactive |
| Color | colorless |
| Uses | lamps, UV-laser |
| Hardness | mohs |
| Toxicity | No |
|
| Reactions |
| Reaction with Air | None |
| Reaction with 6M HCl | None |
| Reaction with 15M HNO3 | None |
| Reaction with 6M NaOH | None |
|
| Other Forms |
| Number of Isotopes | 6 |
| Hydride | None |
| Oxide | None |
| Chloride | None |
|
| Radius |
| Atomic Radius | 112 pm |
| Ionic Radius (1+ ion) | Nil |
| Ionic Radius (1- ion) | Nil |
| Ionic Radius (2+ ion) | Nil |
| Ionic Radius (2- ion) | Nil |
| Ionic Radius (3+ ion) | Nil |
|
| Conductivity |
| Thermal Conductivity | 0.01 J/m-sec-deg |
| Electrical Conductivity | 0 1/mohm-cm |
| Polarizability | 2.5 A3 |
|
| Abundance |
| Source | Air |
| Relation Abundance Solar System | 1.653 log |
| Abundance Earth's Crust | -4 log |
|
