Technetium (Tc) — Transition metal. Atomic number 43.
Silvery-gray radioactive metal
- Atomic number: 43
- Symbol: Tc
- Atomic mass: [98] u
- Category: Transition metal
- State: Solid
- Melting point: 2156.85 °C / 2430 K
- Boiling point: 4264.85 °C / 4538 K
- Density: 11.5 g/cm³ (20°C)
- Electron configuration: [Kr] 4d5 5s2
- Oxidation states: +4, +7
- Electronegativity: 1.9
- Discovered by: Carlo Perrier and Emilio Segrè (1937)
Common uses: Medical imaging, Research
Biological role: No biological role.
Frequently Asked Questions about Technetium
What is the atomic number of technetium?
Technetium has an atomic number of 43, meaning each atom contains 43 protons in its nucleus.
What is the atomic mass of technetium?
The standard atomic weight of technetium is [98] u (unified atomic mass units).
What category does technetium belong to?
Technetium is classified as a transition metal.
What is the state of technetium at room temperature?
Technetium is a solid at 20 °C (68 °F).
What is the melting point of technetium?
The melting point of technetium is 2156.85 °C / 2430 K.
What is the boiling point of technetium?
The boiling point of technetium is 4264.85 °C / 4538 K.
What is the density of technetium?
The density of technetium is 11.5 g/cm³ (20°C).
What is the electronegativity of technetium?
Technetium has a Pauling electronegativity of 1.9.
What is the electron configuration of technetium?
The electron configuration of technetium is [Kr] 4d5 5s2.
What are the common oxidation states of technetium?
Technetium commonly exhibits the following oxidation states: +4, +7.
When was technetium discovered?
Technetium was discovered in 1937 by Carlo Perrier and Emilio Segrè.
Is technetium radioactive?
Technetium is a naturally occurring radioactive element; all of its isotopes are radioactive.
What is the biological role of technetium?
No biological role.
What are the common uses of technetium?
Technetium is used for: Medical imaging; Research.
