| |
General information about Rubidium |
| rubidium |
| Rb |
| 37 |
| alkani metals |
| 1 |
| 5 |
| s |
| soft, silvery-white |
| 85.4678(3) g·mol-1 |
| 1s2 2s2p6 3s2p6d10 4s2p6 5s1 |
| 2, 8, 18, 8, 1 |
| |
|
Physical properties of Rubidium |
| solid |
| ? |
| 312.46(K),
39.31°C, 102.76°F |
| 961(K), 688°C, 1270°F |
| ? |
| (extrapolated) 2093(K), 16 MPa |
| 2.192 kJ·mol-1 |
| 75.77 kJ·mol-1 |
| 31.060 J·mol-1·K-1 |
| 0.82 (Pauling scale) |
| |
|
Atomic structure of Rubidium |
| 2.98 Å |
| 55.9 cm³/mol |
| 2.16 Å |
| 0.38 |
| Cubic body centered |
| 147 (+1e) |
| 5s1 |
| 37 |
| 48 |
| 37 |
| 1 |
| 5s1 |
| |
|
|
|
|
| |
Electron dot
model |
Other languages |
|
| |
Rubidium may be liquid at room temperature. It ignites spontaneously in air and reacts violently in water, setting fire to the liberated hydrogen. Thus, rubidium must be stored under dry mineral oil, in a vacuum, or in an inert atmosphere. It is a soft, silvery-white metallic element of the alkali group. Rubidium is the second most electropositive and alkaline element. Rubidium forms amalgams with mercury and alloys with gold, sodium, potassium, and cesium. It colors a flame yellowish violet.
|
a/barns: