Symbol Tc
Atomic Number 43
Atomic Mass 99 g.mol -1
Discovered by Carlo Perrier and Emilio Segrè

Chemical Properties of Technetium

Group 7 Melting point 2157°C, 3915°F, 2430 K
Period 5 Boiling point 4262°C, 7704°F, 4535 K
Block d Density (g cm−3) 11
Atomic number 43 Relative atomic mass [98]  
State at 20°C Solid Key isotopes Unknown
Electron configuration [Kr] 4d5s2 CAS number 7440-26-8
ChemSpider ID 22396 ChemSpider is a free chemical structure database

What is Technetium?

  • Technetium (Tc) is a chemical element in the periodic table with atomic number 43.
  • It is a silvery-gray radioactive metal which looks similar to platinum.
  • The metals name is derived from the Greek word Tekhnetos which means artificial.


  • Used as a catalyst similar to the way rhenium and palladium are used.
  • Protects steel from corrosion.
  • Certain compounds are helpful in the manufacture of photoelectric nuclear batteries.
  • The metal could be used to map the circulatory system and any disorders.
  • Proposedly could be used in the optoelectric nuclear batteries.

Properties of Technetium

  • The metal is the lightest element that has all isotopes as radioactive and none are stable.
  • Commonly obtained in a powder form which will be in gray color.
  • Artificially generated through many ways like fission, water disposal, and neutron activation.

Certain Facts About Technetium

  • As it is radioactive metal, it is toxic and harmful to life.
  • The compound of 99Tc is very contaminative in nature and hazardous for life.
  • One must use a safety glove box while handling the chemical.

Practise This Question

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