44 Ru 101.072

Ruthenium

TRANSITION METAL

Phase: Solid

Discovered: Karl Ernst Claus

Block: D

Summary

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.

Appearance: silvery white metallic

Source: Wikipedia

Physical Properties

Atomic Mass 101.072 u

Density 12.45 g/cm³

Melting Point 2607 K

Boiling Point 4423 K

Molar Heat 24.06 J/(mol·K)

Electron Affinity 100.96 kJ/mol

Ionization Energies

1^st: 710.2 kJ/mol

2^nd: 1620 kJ/mol

3^rd: 2747 kJ/mol