44 Ru 101.072
Ruthenium
transition metal
Properties
- Atomic number
- 44
- Atomic mass
- 101.072 u
- Category
- transition metal
- Group
- 8
- Period
- 5
- Block
- d-block
- State (room temp)
- Solid
- Outer-shell electrons
- 1
- Electronegativity
- 2.2 (Pauling)
- Density
- 12.45 g/cm³
- Melting point
- 2333.85 °C
- Boiling point
- 4149.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s¹ 4d⁷
Noble-gas shorthand: [Kr] 4d⁷ 5s¹
Electrons per shell: 2, 8, 18, 15, 1 — that's 1 in the outermost shell.
About 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.
- Discovered by Karl Ernst Claus
- Appearance: silvery white metallic
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.