Ruthenium
Symbol
Ru
Atomic Number
44
Atomic Weight
101.07
Element Classification
Discovered By
Karl Klaus
Discovery Date
1844 (Russia)
Name Origin
Latin: Ruthenia (Russia).
Density(g/cc)
12.41
Melting Point
2583
Boiling Point(K)
4173
Appearance
Rare, silver-gray, extremely brittle metal
Atomic Radius(pm)
134
Atomic Volume(cc/mol)
8.3
Covalent Radius(pm)
125
Ionic Radius
67 (+4e)
Specific Heat
0.238
Fusion Heat
(25.5)
Evaporation Heat(kj/mol)
n/a
Thermal Conductivity(@25°C W/m K)
117.0
Debye Temperature
n/a
Pauling Negativity Number
2.2
First Ionizing Energy(kj/mol)
710.3
Oxidation States
8, 6, 4, 3, 2, 0, -2
Electronic Configuration
[Kr] 4d7 5s1
Lattice Structure
Hexagonal(HEX)
Lattice Constant
2.700
Lattice C/A Ratio
1.584
