Classification of Holmium
Holmium (Ho), with atomic number 67, is definitively classified as a metal. It belongs to the lanthanide series, often referred to as rare earth elements. All elements within the lanthanide series exhibit metallic properties.
Observable Physical Characteristics
Color and Luster
Holmium is a silvery-white metal. When freshly prepared, it exhibits a bright, metallic luster. This luster can diminish over time as the surface oxidizes upon exposure to air.
Texture and Malleability
The metal is relatively soft and possesses good malleability, meaning it can be hammered or pressed into thin sheets without breaking. It is also ductile, allowing it to be drawn into fine wires. Its hardness is comparable to that of magnesium.
State of Matter
At standard room temperature (approximately 20-25 °C or 68-77 °F), Holmium exists as a solid.
Thermal Properties
Melting Point
Holmium has a melting point of approximately 1474 °C (2685 °F). This temperature is relatively high, indicating strong metallic bonding within its crystal lattice.
Boiling Point
The boiling point of Holmium is approximately 2695 °C (4883 °F). This high temperature is required to overcome the interatomic forces and transition the element from a liquid to a gaseous state.