44
Ru
Ruthenium
Transition metal period 5 group 8 d-block discovered: 1827
As a chemical element
Properties of the atom — they do not depend on what substance it is part of.
- Atomic number
- 44
- Atomic mass
- 101.1 a.m.u.
- Electron configuration
- [Kr]5s1 4d7
- Electronegativity
- 2.2 on the Pauling scale
- Atomic radius
- 207 pm
- Ionization energy
- 7.361 eV
- Electron affinity
- 1.05 eV
- Oxidation states
- +3
As a simple substance
Properties of the substance these atoms form under ordinary conditions.
- State at 25 °C
- Solid
- Melting point
- 2607 K (2 333,85 °C)
- Boiling point
- 4423 K (4 149,85 °C)
- Density
- 12.1 g/cm³