Periodic Table of Elements

44

Ruthenium

97.91

Ruthenium was discovered by the Russian scientist Karl Ernst Claus in 1844.

Name: Ruthenium
Symbol: Ru
Atomic number: 44
Atomic weight: 101.07
State: solid
Group, period, block: 8, 5, d
Color: silvery white metallic
Classification: transition metal
Electron configuration: 4d7 5s1
2,8,18,15,1

Physical properties

Density: 12.45 g/cm-3
Melting point: 2607 K,2334 C,4233 F
Boiling point: 4423 K,4150 C,7502 F

Atomic properties

Oxidation states: 8, 7, 6, 4, 3, 2, 1,[1] -2
Electronegativity: 2.2 (Pauling scale)
Ionization energies: 1st: 710.2 kJmol-1
Covalent radius: 1467 pm
Van der Waals radius: no data
  • Ru
  • Electron Configuration

Isotopes

There are seven naturally occurring isotopes of ruthenium exist, 96Ru, 98Ru, 99Ru, 100Ru, 101Ru, 102Ru, and 104Ru.