Element Properties
By Name
By Atomic Number
By Density
Melting & Boiling Point
Electron Configuration
Radioactive Elements
Noble & Precious Metals
Periodic Table
Groups
Periodic Table
Alkali Metals
Alkaline Earth Metals
Halogens
Noble (Inert) Gases
Rare Earth Elements
Transition Metals
Metalloids (Semimetals)
Nonmetals
Poor Metals
Materials
Toxic Substances
Semiconductor Materials
Vitamins
Amino Acids
Inventions
& Patents
Reference
|
Krypton
Chemical Properties & Compounds
| Symbol | Atomic Number | Atomic Weight | Melting Point | Boiling Point | Phase | Density | Classification |
| Kr | 36 | 83.798 | -157.36 °C | -153.22 °C | Gas | 3.749 g/L | Noble Gas |
|
|
|
| General |
| Name, Symbol, Number |
krypton, Kr, 36 |
| Chemical series |
noble gases |
| Group, Period, Block |
18, 4, p |
| Appearance |
colorless
 |
| Standard atomic weight |
83.798(2) g·mol−1 |
| Electron configuration |
[Ar] 3d10 4s2 4p6 |
| Electrons per shell |
2, 8, 18, 8 |
| Physical properties |
| Phase |
gas |
| Density |
(0 °C, 101.325 kPa)
3.749 g/L |
| Melting point |
115.79 K
(-157.36 °C, -251.25 °F) |
| Boiling point |
119.93 K
(-153.22 °C, -244.12 °F) |
| Triple point |
115.775 K, 73.2 kPa[1] |
| Critical point |
209.41 K, 5.50 MPa |
| Heat of fusion |
1.64 kJ·mol−1 |
| Heat of vaporization |
9.08 kJ·mol−1 |
| Heat capacity |
(25 °C) 20.786 J·mol−1·K−1 |
Vapor pressure
| P(Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T(K) |
59 |
65 |
74 |
84 |
99 |
120 |
|
| Atomic properties |
| Crystal structure |
cubic face centered |
| Oxidation states |
2 |
| Electronegativity |
3.00 (scale Pauling) |
Ionization energies
(more) |
1st: 1350.8 kJ·mol−1 |
| 2nd: 2350.4 kJ·mol−1 |
| 3rd: 3565 kJ·mol−1 |
| Atomic radius (calc.) |
88 pm |
| Covalent radius |
110 pm |
| Van der Waals radius |
202 pm |
| Miscellaneous |
| Magnetic ordering |
nonmagnetic |
| Thermal conductivity |
(300 K) 9.43 m W·m−1·K−1 |
| Speed of sound |
(gas, 23 °C) 220 m/s |
| Speed of sound |
(liquid) 1120 m/s |
| CAS registry number |
7439-90-9 |
| Selected isotopes |
|
|
| References |
|
Krypton Compounds
|
Source: Wikipedia article Krypton
|
|
Chemistry Quick Facts
