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Technetium (Tc) properties


Atomic mass, symbol and atomic number

technetium is a naturally occurring element with the element symbol Tc and the ordinal number 43. In the periodic table it stands with an atomic mass of 98.906 u in the 7th subgroup. The chemical element discovered by Emilio Segrè in 1937 is radioactive and is in a solid state of aggregation at room temperature.

Profile: Technetium (English Technetium)

General
Chemical element:technetium
Symbol:tc
Atomic number:43
Group:Manga group
Period:5
Block:d-block
Series:Transition metals
Appearance:silvery to greyish
explorers:Emilio Segrè
Year of discovery:1937
Atomic properties
Atomic mass:98,906 u
Atomic radius:135 pm
Covalent radius:147 pm
Van der Waals radius:unknown
Electron configuration:Kr 4d5 5s2
ionization:702 kJ / mol
Physical Properties
Physical state:firmly
Density:???
Crystal structure:hexagonal
Magnetism:paramagnetic
molar volume:8,63 · 10-6 m3/ mol
Mohs hardness:???
Melting point:2157 ° C
Boiling point:4265 ° C
Heat of fusion:23 kJ / mol
Heat of vaporization:550 kJ / mol
Thermal conductivity:51 W
Chemical properties
electronegativity:1,9

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