Ruthenium

Koushik 26/06/2026 19:58:08 Updated 26/06/2026 19:58:08
Property Value
Atomic Number 44
Element Ruthenium
Symbol Ru
Atomic Mass 101.07 u
Number of Neutrons 57 (most common isotope, Ruthenium-102)
Number of Protons 44
Number of Electrons 44
Period 5
Group 8
Phase Solid
Radioactive No
Natural Yes
Metal Yes
Nonmetal No
Metalloid No
Type Transition Metal
Atomic Radius 178 pm
Electronegativity 2.20 (Pauling scale)
First Ionization Energy 7.361 eV
Density 12.37 g/cm³
Melting Point 2334 °C
Boiling Point 4150 °C
Number of Isotopes 7 stable (Ru-96, Ru-98, Ru-99, Ru-100, Ru-101, Ru-102, Ru-104)
Discoverer Karl Ernst Claus
Year 1844
Specific Heat 0.238 J/g·K
Number of Shells 5
Number of Valence Electrons 8
Tags: Tutorials Chemistry tutorial step by step learn how to guide examples
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