Atomic NumberAtomic Number of Rubidium
Atomic Number of Rubidium is 37.
Chemical symbol for Rubidium is Rb. Number of protons in Rubidium is 37. Atomic weight of Rubidium is 85.4678 u or g/mol. Melting point of Rubidium is 39 °C and its the boiling point is 688 °C.
» Boiling Point » Melting Point » Abundant » State at STP » Discovery YearAbout Rubidium
Rubidium is a soft and quite reactive metal. It easily reacts with water and air. Its name is derived from a Latin word meaning a deep red color. This element is non-toxic and it has no biological importance but it can be found in our body is really very small amounts. Its properties in living organisms are similar to the ones of potassium. In nature, rubidium is found in some minerals like leucite, carnalite, and others, and it is among 25 most common chemical elements on the surface of our planet. Rubidium creates a few compounds with other chemical elements, but it is used rather for research than in industry.
Properties of Rubidium Element
| Atomic Number (Z) | 37 |
|---|---|
| Atomic Symbol | Rb |
| Group | 1 |
| Period | 5 |
| Atomic Weight | 85.4678 u |
| Density | 1.532 g/cm3 |
| Melting Point (K) | 312.46 K |
| Melting Point (℃) | 39 °C |
| Boiling Point (K) | 961 K |
| Boiling Point (℃) | 688 °C |
| Heat Capacity | 0.363 J/g · K |
| Abundance | 90 mg/kg |
| State at STP | Solid |
| Occurrence | Primordial |
| Description | Alkali metal |
| Electronegativity (Pauling) χ | 0.82 |
| Ionization Energy (eV) | 4.17713 |
| Atomic Radius | 235pm |
| Covalent Radius | 211pm |
| Valence Electrons | 1 |
| Year of Discovery | 1861 |
| Discoverer | Bunsen and Kirchhoff |