43

Tc

Technetium
[ 98 ]
 Historical Information

Element 43 (technetium) was predicted on the basis of the periodic table by Mendeleev. He suggested that it should be very similar to manganese and gave it the name ekamanganese. Technetium was discovered by Carlo Perrier, Emilio Segre at 1937 in Italy. Origin of name: from the Greek word "technikos" meaning "artificial".
Basic Information Shells
  • Name: Technetium
  • Symbol: Tc
  • Atomic number: 43
  • Atomic weight: [ 98 ]
  • Standard state: solid at 298 K
  • Group in periodic table: 7
  • Group name:none
  • Period in periodic table: 5
  • Block in periodic table: d-block
  • Classification: Metallic
 technetium
Uses Trivia
  • Tc is used for tracer work (radioactive tracers)
  • superconductor at 11 K and below
  • medical imaging agents

Technetium is a silvery-grey metal that tarnishes slowly in moist air. Until 1960, technetium was available only in small amounts. The chemistry of technetium is related to that of rhenium.