Atomic symbol: Tc
Atomic number: 43
Atomic mass: (97.91)
Appearance: Shiny gray solid at 25°C
Series: Transition metals
Electron configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d⁵ 5s²
A radioactive metal, in all isotopic forms, used today in nuclear medicine.
All technetium isotopes have very short half-lives: most are less than 1 hour.
Fun fact! Aptly named after the Greek word “tekhnetos” meaning artificial, technetium is the first synthetically produced element, predominantly from spent nuclear fuel rods.
Footnote 1 ↩︎