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.

Atomic Weight:  101.07
Density:        12.37 g/cm3
Melting Point:  2334 °C
 Boiling Point: 4150 °C