RuZ =  44

From the Latin "Ruthenia", meaning "Russia"
(AM) Atomic Mass 101.07  amu    Oxidation States +3, +4, +6, +8
   (BP) Boiling Point 3900  °C    (MP) Melting Point 2310  °C
   (ρ) Density 12.1  g/cm3    Crystal Structure Hexagonal
   ( χ ) Electronegativity 2.2    (AR) Atomic Radius 1.26  Å
   Physical State Solid (C) Heat Capacity 0.238  J/g °C
Electronic-Config [Kr]  4d7  5s1     (I1) First Ionization E 711.09  kJ/mol
   (ΔHvap) Heat of Vaporization 591.6  kJ/mol     (ΔHfus) Heat of Fusion 38.59  kJ/mol
   Year of Discovery 1844    Location of Discovery Russia
(E°) Standard Potential None
Stable isotopes  100Ru,  101Ru,  102Ru,  104Ru,  96Ru,  98Ru,  99Ru
Discovered/Synthesized by Karl Karlovich Klaus
Natural Source Isolated from the native elements or alloys of the various elements or arsenides
Common Uses Electric contacts, leaf switches, pen tips, catalyst, hydrogen production
Other Info Included in the tips of ballpoints of Parker pens
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