Ru
Ruthenium Symbol (Ru)
Ruthenium is element 44 of the periodic table. Copy its symbol Ru and see its atomic weight, electron configuration and physical properties.
What does Ru mean?
Ru is the chemical symbol for ruthenium, element number 44 in the periodic table. Ruthenium is a transition metal in group 8, period 5. It is a solid at room temperature and was discovered in 1827.
Codes and properties
| Chemical symbol | Ru |
|---|---|
| Atomic number (Z) | 44 |
| Atomic weight (PubChem) | 101.1 |
| Group / period | 8 / 5 |
| Element category | transition metal |
| Electron configuration | [Kr]5s¹ 4d⁷ |
| State at 20 °C | Solid |
| Oxidation states | +3 |
| Electronegativity (Pauling) | 2.2 |
| Melting point | 2607 K (2333.85 °C) |
| Boiling point | 4423 K (4149.85 °C) |
| Density | 12.1 g/cm³ |
| Discovered | 1827 |
How to type Ru
- Plain text: type
Ru— 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{Ru}in math mode, or use the mhchem package:\ce{Ru}. - HTML:
Ru; for subscripts use<sub>, e.g.H<sub>2</sub>O.
Frequently asked questions
What is the chemical symbol for ruthenium?
The chemical symbol for ruthenium is Ru.
What is the atomic number of ruthenium?
Ruthenium has atomic number 44, meaning each atom has 44 protons.
What is the electron configuration of ruthenium?
The ground-state electron configuration of ruthenium is [Kr]5s¹ 4d⁷.
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Reference: Ruthenium on PubChem (NIH)