Technetium

An anomaly of an element

Physical Properties

Technetium is very radioactive, which is strange considering that it is in the middle of the most stable metals on the Periodic Table


  • Family #7
  • Period #5
  • Chemical symbol Tc
  • Atomic Number 43
  • Atomic Mass 98
  • Protons 43
  • Neutrons 55
  • Electrons 47
  • Valence Electrons 1
  • Melts at 2200 C or 2473.15 K
  • Boils at 4877 C or 5150 K
  • Density at 11.5 g/cm cubed at 20 C
  • Mostly not naturally occurring, though some argue that trace amounts appear in the crust
  • Humans use it to generate x-ray radiation for medical purposes

If you ever get an x-ray photograph, then you have been exposed to technetium. Technetium is the element that they use to make the x-ray radiation due to technetium being radioactive, but relatively controllable.

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Citations

Gray, Theodore W., and Nick Mann. The Elements: A Visual Exploration of Every Known Atom in the Universe. New York: Black Dog & Leventhal, 2009. Print.


Helmenstine, Ph.D. Anne Marie. "Periodic Table of the Elements." About.com Chemistry. N.p., n.d. Web. 13 Oct. 2015.