44
Ru
101.07
Ruthenium
Element 44 · 101.07 u · d-block
transition metal
A rare platinum group metal. Used in electronics, solar cells, and as a catalyst.
Phase (STP)
Solid
Melting Point
2334 °C
Boiling Point
4150 °C
Density
12.37 g/cm³
Electronegativity
2.2
Atomic Radius
130 pm
Ionization Energy
710 kJ/mol
Electron Affinity
101 kJ/mol
Discovered
1844 · Karl Ernst Claus
Electron Configuration
[Kr] 4d7 5s1
Electron Orbitals
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