Rb
Rubidium Symbol (Rb)
Rubidium is element 37 of the periodic table. Copy its symbol Rb and see its atomic weight, electron configuration and physical properties.
What does Rb mean?
Rb is the chemical symbol for rubidium, element number 37 in the periodic table. Rubidium is an alkali metal in group 1, period 5. It is a solid at room temperature and was discovered in 1861.
Codes and properties
| Chemical symbol | Rb |
|---|---|
| Atomic number (Z) | 37 |
| Atomic weight (PubChem) | 85.468 |
| Group / period | 1 / 5 |
| Element category | alkali metal |
| Electron configuration | [Kr]5s¹ |
| State at 20 °C | Solid |
| Oxidation states | +1 |
| Electronegativity (Pauling) | 0.82 |
| Melting point | 312.46 K (39.31 °C) |
| Boiling point | 961 K (687.85 °C) |
| Density | 1.53 g/cm³ |
| Discovered | 1861 |
How to type Rb
- Plain text: type
Rb— element symbols are ordinary Latin letters, with the first letter capitalised and the second lowercase. - Subscripts in formulas: use Unicode subscript digits (₀₁₂₃₄₅₆₇₈₉) for formulas such as H₂O — copy them from the chemistry keyboard.
- LaTeX: write
\mathrm{Rb}in math mode, or use the mhchem package:\ce{Rb}. - HTML:
Rb; for subscripts use<sub>, e.g.H<sub>2</sub>O.
Frequently asked questions
What is the chemical symbol for rubidium?
The chemical symbol for rubidium is Rb.
What is the atomic number of rubidium?
Rubidium has atomic number 37, meaning each atom has 37 protons.
What is the electron configuration of rubidium?
The ground-state electron configuration of rubidium is [Kr]5s¹.
Related symbols
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Reference: Rubidium on PubChem (NIH)