Ruthenium (Ru)
Ruthenium
Ruthenium (Ru) is a transition metal in period 5, group 8. Its relative atomic mass is 101.07 and the molar mass of the atom is 101.07 g/mol.
Atomic number 44
Atomic mass 101.07
Molar mass 101.07 g/mol
Category Transition metal Solid
Properties of ruthenium
| Atomic number | 44 |
|---|---|
| Symbol | Ru |
| Latin name | Ruthenium |
| Relative atomic mass | 101.07 |
| Molar mass | 101.07 g/mol |
| Group, period, block | 8, 5, d |
| Category | Transition metal |
| State at 20 °C | Solid |
| Electron configuration | [Kr] 4d⁷ 5s¹ |
| Electronegativity (Pauling) | 2.2 |
| Atomic radius | 130 pm |
Electron configuration of ruthenium
Electrons per shell
K2L8M18N15O1
Full notation
1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d⁷ 5s¹
Noble-gas notation
44 protons · 44 electrons[Kr] 4d⁷ 5s¹
Formula and compounds of ruthenium
Simple substanceRurutheniumMolar mass of Ru: 101.07 g/mol
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Frequently asked questions
The relative atomic mass of ruthenium is 101.07, so the molar mass of the atom is 101.07 g/mol.
Full: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d⁷ 5s¹. Noble-gas notation: [Kr] 4d⁷ 5s¹.