Symbol
Tc
Atomic Number
43
Atomic Mass
98
Protons
43
Neutrons
55
Electrons
43
Type
Transition Metal
Isotopes
Technetium-97, Technetium-98, Technetium-99
Discovery Year
1937
Discovered By
Carlo Perrier, Emilio Segrè
Group
7
Period
5
Boiling Point
4532°F
Melting Point
4264°F
Electron Configuration
[Kr] 5s² 4d⁵
Density (g/cm³)
11.5
Crystal Structure
Hexagonal
Magnetism
Paramagnetic
Abundance in Earth's Crust
Trace
Phase at Room Temperature
Solid