43Tc

Technetium

Transition Metal

Technetium (Tc) is element 43, a transition metal, in period 5 and group 7 of the periodic table. Its atomic mass is usually given as 98, it melts at 2157 °C and boils at 4265 °C. Discovered by Carlo Perrier, 1937.

Atomic Number43

SymbolTc

NameTechnetium

Atomic Weight98 u

CategoryTransition Metal

Period5

Group7

Melting Point2157 °C

Boiling Point4265 °C

Density11.5 g/cm³

Electron Config[Kr] 4d5 5s2

Discovered ByCarlo Perrier, 1937

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