Holmium (Ho) — Lanthanide. Atomic number 67.
Soft silvery metal
- Atomic number: 67
- Symbol: Ho
- Atomic mass: 164.93 u
- Category: Lanthanide
- State: Solid
- Melting point: 1473.85 °C / 1747 K
- Boiling point: 2699.85 °C / 2973 K
- Density: 8.8 g/cm³ (20°C)
- Electron configuration: [Xe] 4f11 6s2
- Oxidation states: +3
- Electronegativity: 1.23
- Discovered by: Marc Delafontaine and Jacques-Louis Soret (1878)
Common uses: Magnets, Lasers, Nuclear control materials
Biological role: No known biological role.
Frequently Asked Questions about Holmium
What is the atomic number of holmium?
Holmium has an atomic number of 67, meaning each atom contains 67 protons in its nucleus.
What is the atomic mass of holmium?
The standard atomic weight of holmium is 164.93 u (unified atomic mass units).
What category does holmium belong to?
Holmium is classified as a lanthanide.
What is the state of holmium at room temperature?
Holmium is a solid at 20 °C (68 °F).
What is the melting point of holmium?
The melting point of holmium is 1473.85 °C / 1747 K.
What is the boiling point of holmium?
The boiling point of holmium is 2699.85 °C / 2973 K.
What is the density of holmium?
The density of holmium is 8.8 g/cm³ (20°C).
What is the electronegativity of holmium?
Holmium has a Pauling electronegativity of 1.23.
What is the electron configuration of holmium?
The electron configuration of holmium is [Xe] 4f11 6s2.
What are the common oxidation states of holmium?
Holmium commonly exhibits the following oxidation states: +3.
When was holmium discovered?
Holmium was discovered in 1878 by Marc Delafontaine and Jacques-Louis Soret.
Is holmium radioactive?
Holmium is a stable element with no naturally occurring radioactive isotopes.
What is the biological role of holmium?
No known biological role.
What are the common uses of holmium?
Holmium is used for: Magnets; Lasers; Nuclear control materials.
