Atomic Element Z = 44 • Transition Metal
Ruthenium (Ru) — Atomic Data, Electron Shells & Reactions
Ruthenium (symbol Ru, atomic number 44) has a standard atomic weight of 101.07 u and ground-state configuration [Kr] 4d7 5s1.
Atomic Number (Z)
44
IUPAC Symbol
Ru
Standard Atomic Weight
101.07 g/mol
Period / Group / Block
5 / 8 / d-block
Condensed Electron Config
[Kr] 4d7 5s1
Full Subshell Config
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d7 5s1
Principal Shell Occupancy
[2, 8, 18, 15, 1]
Pauling Electronegativity
2.2
First Ionization Energy
710 kJ/mol
Covalent Radius
146 pm
Melting Point
2607 K (2333.85 °C)
Boiling Point
4423 K (4149.85 °C)
Density
12.37 g/cm³
Oxidation States
+4, +3
Ru (Z=44) — Valence shell highlighted in vermilion