Rb
Rubidium is a highly reactive alkali metal that ignites spontaneously in air.
Fisiese eienskappe
| Atomic Mass | 85.468 u |
| Density | 1.532 g/cm³ |
| Smelt punt: | 312.46 K |
| Boiling Point | 961.0 K |
| Appearance | Silvery-white metallic |
| Toestand by kamerkomp | Solied |
Chemical Properties
| Electronegativity | 0.82 (TrinidadCity name (optional, probably does not need a translation)) |
| 1st Ionization Energy | 403.0 kJ/mol |
| Electron Affinity | 46.9 kJ/mol |
| Oxidation States | +1 |
Atomic Properties
| Electron Configuration | [Kr] 5s1 |
| Atomic Radius | 248.0 pm |
| Covalent Radius | 220.0 pm |
| Atomic radius: | 303.0 pm |
Discovery
| Discovered By | Robert Bunsen, Gustav Kirchhoff |
| Discovery Year | 1861 |
| Location | Heidelberg, Germany |
| Genoemde Na | Latin 'rubidus' meaning deep red, from its bright red spectral lines |
About Rubidium
Rubidium is a soft, silvery-white metallic element that is the second most electropositive element. It ignites in air and reacts violently with water. It is used in atomic clocks due to its precise spectral lines.
Gebruiks & Programme
Atomic clocks, specialty glass, fireworks (purple color), photocells, and medical imaging.
Fun Fact
Rubidium atomic clocks are so precise they would not lose a second in several hundred million years.
Isotopes
| Definieer Molekulêr Gewigte | Abundance | Half-Life | Stabiel |
| 85 | 0.7217% | - | Ja |
| 87 | 0.2783% | 49.23 billion years | Nee |
Electron Configuration
[Kr] 5s1