Periodic table of the elements
TechnetiumRutheniumRhodium
44
Ru
Ruthenium
101.07
2
8
18
15
1
44
Ru
Ruthenium
101.07
2
8
18
15
1
General
NameRuthenium
SymbolRu
Number44
Chemical seriesTransition elements
Group / Period8 / 5
Blockd-block
CAS registry number7440-18-8

Physical properties
Statesolid
Density12.45 g/cm3
Melting point2607 K (2334°C, 4233°F)
Boiling point4423 K (4150 °C, 7502 °F)
Critical point

Atomic properties
Atomic Weight101.07 g/mol
Crystal structurehexagonal
Electronegativity2.20
Atomic radius130 pm
Atomic radius (calculated)178 pm
Electron configuration[Kr] 4d7 5s1
Electrons per shell2, 8, 18, 15, 1
Number of protons44
Number of neutrons57

Other languages
SpanishRutenio
PortugueseRuténio
FrenchRuthénium
GermanRuthenium
ItalianRutenio
RussianРутений
PolishRuten
Chinese
Arabicروثينيوم
TurkishRutenyum
DutchRuthenium


Periodic table of the elements
TechnetiumRutheniumRhodium