43
Tc
97
Technetium (Tc)
Element 43 · Period 5 · Group 7
transition-metal
solid at room temp
d-block
radioactive
About Technetium
First artificially produced element. All isotopes radioactive. Used in medical imaging.
Physical Properties
Atomic Mass
97 u
State at 25°C
Solid
Melting Point
2157 °C
Boiling Point
4265 °C
Density
11 g/cm³
Magnetism
Paramagnetic
Atomic Properties
Electron Configuration
[Kr] 4d⁵ 5s²
Electron Shells
2, 8, 18, 13, 2
Electronegativity
1.9
Atomic Radius
183 pm
Ionization Energy
702 kJ/mol
Oxidation States
+4 to +7
Discovery & History
Discovered By
Carlo Perrier
Discovery Year
1937
Named By
Carlo Perrier
Name origin: Greek: technetos (artificial)
Frequently Asked Questions
- Is Technetium a metal, nonmetal, or metalloid?
- Technetium is classified as a transition-metal.
- What state is Technetium in at room temperature?
- Technetium is a solid at standard room temperature (25°C).
- What is the atomic mass of Technetium?
- Technetium has an atomic mass of 97 atomic mass units (u).
- Who discovered Technetium?
- Technetium was discovered by Carlo Perrier in 1937.
- Where is Technetium on the periodic table?
- Technetium is element number 43, located in period 5 and group 7.