Frequently Asked Questions about Thulium
What is the atomic number of thulium?
Thulium has an atomic number of 69, meaning each atom contains 69 protons in its nucleus.
What is the atomic mass of thulium?
The standard atomic weight of thulium is 168.93 u (unified atomic mass units).
What category does thulium belong to?
Thulium is classified as a lanthanide.
What is the state of thulium at room temperature?
Thulium is a solid at 20 °C (68 °F).
What is the melting point of thulium?
The melting point of thulium is 1544.85 °C / 1818 K.
What is the boiling point of thulium?
The boiling point of thulium is 1949.85 °C / 2223 K.
What is the density of thulium?
The density of thulium is 9.32 g/cm³ (20°C).
What is the electronegativity of thulium?
Thulium has a Pauling electronegativity of 1.25.
What is the electron configuration of thulium?
The electron configuration of thulium is [Xe] 4f13 6s2.
What are the common oxidation states of thulium?
Thulium commonly exhibits the following oxidation states: +2, +3.
When was thulium discovered?
Thulium was discovered in 1879 by Per Teodor Cleve.
Is thulium radioactive?
Thulium is a stable element with no naturally occurring radioactive isotopes.
What is the biological role of thulium?
No known biological role.
What are the common uses of thulium?
Thulium is used for: Portable X-ray sources; Lasers; Research.
