Date of Discovery: 1844
Discoverer: Karl Klaus
Name Origin: From the Latin word Ruthenia (Russia)
Uses: platinum alloys
Obtained From: pentlandite, pyroxinite

 
Atomic Number: 44
Atomic Mass: 101.07 amu
Melting Point: 2250.0 °C (2523.15 K, 4082.0 °F)
Boiling Point: 3900.0 °C (4173.15 K, 7052.0 °F)
Crystal Structure: Hexagonal
Density @ 293 K: 12.2 g/cm3
Color: silvery

 
Isotope Ru-96
Ru-97
Ru-98
Ru-99
Ru-100
Ru-101 Ru-102 Ru-103
Ru-104
Ru-105
Ru-106
Half Life
Stable
2.89 days
Stable
Stable
Stable
Stable Stable 39.27 days Stable 4.44 hours 1.02 years