Rubidium
| Basic Information | Crystal Structure | Isotope | Facts | Related Links |
| Symbol: | Rb |
| Atomic Number: | 37 |
| Atomic weight: | 85.4678u |
| Melting Point: | 312.64K |
| Boiling Point: | 961K |
| Number of Protons/Electrons: | 37 |
| Number of Neutrons: | 48 |
| Classification: | Alkali Metal |
| Crystal Structure: | Body Centered Cubic |
| Density at 293 K: | 1.53g/mL |
| Color: | Silver |
| Bonding radius: | 2.16A |
| Atomic radius: | 2.98A |
| Ionization Potential: | 4.177V |
| Electronegativity: | 0.82 |
| Heat of vaporization: | 72.216kJ/mol |
| Heat of fusion: | 2.192kJ/mol |
| Specific heat: | 0.363J/gK |
| Electron configuration: | [Kr]5s1 |
Crystal Structure
| Isotope | Half Life |
| Rb81 | 4.57 hours |
| Rb82 | 2.25 minutes |
| Rb83 | 86.2 days |
| Rb84 | 32.9 days |
| Rb85 | Stable |
| Rb86 | 18.65 days |
| Rb87 | 4.8E10 years |
| Rb88 | 17.7 minutes |
| Rb89 | 15.44 minutes |
| Rb90 | 2.6 minutes |
| Rb90m | 4.3 minutes |
| Date of Discovery: | 1861 |
| Discoverer: | R. Bunsen |
| Uses: | catalyst, photocells |
| Obtained From: | lithium production |