Periodic table of the elements
MolybdenumTechnetiumRuthenium
43
Tc
Technetium
98.9063
2
8
18
13
2
43
Tc
Technetium
98.9063
2
8
18
13
2
General
NameTechnetium
SymbolTc
Number43
Chemical seriesTransition elements
Group / Period7 / 5
Blockd-block
CAS registry number7440-26-8

Technetium is a radioactive element

Physical properties
Statesolid
Density11.5 g/cm3
Melting point2430 K (2157°C, 3915°F)
Boiling point4538 K (4265 °C, 7709 °F)
Critical point

Atomic properties
Atomic Weight98.9063 g/mol
Crystal structurehexagonal
Electronegativity1.90
Atomic radius135 pm
Atomic radius (calculated)183 pm
Electron configuration[Kr] 4d5 5s2
Electrons per shell2, 8, 18, 13, 2
Number of protons43
Number of neutrons55

Other languages
SpanishTecnecio
PortugueseTecnécio
FrenchTechnétium
GermanTechnetium
ItalianTecnezio
RussianТехнеций
PolishTechnet
Chinese
Arabicتكنيتيوم
TurkishTeknesyum
DutchTechnetium


Periodic table of the elements
MolybdenumTechnetiumRuthenium