44Solid
Ru 101.07 Atomic mass · uTransition metals
Ruthenium
Ruthenium is a chemical element with symbol Ru and atomic number 44. It is a rare transition metal belonging to the platinum group of the periodic table. Like the other metals of the platinum group, ruthenium is inert to most other chemicals.
Discovery 1827 (Karl Ernst Claus)
K2L8M18N15O1
Physical properties
Values for the element in its standard state.
- Density
- 12.37g/cm³
- Melting point
- 2,607K
- Boiling point
- 4,423K
- Atomic radius
- 126pm
- Bonding type
- Metallic
- Molar heat
- 24.06J/(mol·K)
Inside the atom
Electron arrangement and the energy behind its behavior.
Full electron configuration
1s, 2 electrons; 2s, 2 electrons; 2p, 6 electrons; 3s, 2 electrons; 3p, 6 electrons; 3d, 10 electrons; 4s, 2 electrons; 4p, 6 electrons; 4d, 7 electrons; 5s, 1 electrons;
[Kr] represents 36 core electrons. The full view shows them explicitly.
44 electrons Orbital order preserved from source
- Electronegativity
- 2.2Pauling scale
- First ionization energy
- 710kJ/mol
- Electron affinity
- 101kJ/mol
- Van der Waals radius
- Not available
Ru RutheniumAtomic number 44
710kJ/mol
Atomic numberGaps indicate unavailable data
About ruthenium
- Appearance
- Silvery white metallic
- Discovery
- 1827 (Karl Ernst Claus)
- Data source
- Read the reference
A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.