The Nature of Ruthenium
Ruthenium is classified as a transition metal. Specifically, it is a member of the platinum group metals (PGM), found in Group 8 of the periodic table. This classification indicates its metallic properties, including good electrical and thermal conductivity, and the ability to form compounds with variable oxidation states.
Macroscopic Physical Characteristics
Appearance
Ruthenium exhibits a distinctive silvery-white luster. When observed as a solid, it presents a bright, reflective surface characteristic of many metals. Its texture is notably hard and brittle. This brittleness means that while it is a strong material, it can fracture rather than deform under stress, unlike more malleable metals such as gold or copper.
State at Room Temperature
At standard room temperature (approximately 20-25 °C or 68-77 °F), Ruthenium exists as a solid. This is typical for most metallic elements.
Thermal Properties
Melting Point
Ruthenium possesses a high melting point, recorded at approximately 2334 °C. This high temperature indicates strong metallic bonds within its crystal lattice, requiring significant energy to overcome and transition the material from a solid to a liquid state.
Boiling Point
The boiling point of Ruthenium is exceptionally high, approximately 4150 °C. This further underscores the robustness of its atomic structure, as an even greater amount of energy is needed to break these bonds sufficiently for the element to transition from a liquid to a gaseous state.