43Tc
Technetium
테크네튬 · テクネチウム
Transition metal
Atomic number43
ElementTc — Technetium
Atomic mass98
CategoryTransition metal
Group7
Period5
Electron config[Kr] 4d5 5s2
Shells2,8,18,13,2
State (RT)Solid
Melting pt2157°C
Boiling pt4265°C
Electronegativity1.9
Discovered1937
Main usesMedical imaging tracers
2 · 8 · 18 · 13 · 2