44 Ru
Transition metal
Ruthenium
Used in electrical contacts.
Properties of Ruthenium
- Atomic number (Z)
- 44
- Symbol
- Ru
- Atomic mass
- 101.07 g/mol
- Category
- Transition metal
- Group
- 8
- Period
- 5
- Electron configuration
- [Kr] 4d⁷ 5s¹
- Electronegativity (Pauling)
- 2.2
- Atomic radius
- 178 pm
- First ionization energy
- 710 kJ/mol
- Melting point
- 2607 K (2333.8 °C)
- Boiling point
- 4423 K (4149.9 °C)
- Density
- 12.37 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1844