Definition

Noun 1. A rare polyvalent metallic element of the platinum group; it is found associated with platinum: "Ru" is the chemical symbol for the element ruthenium, a hard, silvery-white metal.

Usage

• "Ru" is used almost exclusively in scientific contexts, particularly in chemistry, materials science, and periodic table references.
• It functions as a proper noun representing the element.

Examples

• In a chemical context:
• Discussing properties: Ru
• In a list:

Advanced Usage

• In compound names: The symbol "Ru" is used to denote ruthenium within the names of chemical compounds.
  • Ruthenium red is a stain used in microscopy. (Here, "ruthenium" is the full name, not the symbol "Ru").
  • The complex, Ru(bpy)₃²⁺, is a common photosensitizer. (Here, "Ru" is the symbol used in the chemical formula).

Variants and Related Words

• Ruthenium (n): The full name of the element for which "Ru" is the symbol.
• Ruthenate (n): A salt containing ruthenium and oxygen (e.g., sodium ruthenate).
• Ruthenious (adj): Relating to ruthenium with a lower valence state.

Synonyms

• Ruthenium: This is not a synonym but the full name of the element represented by the symbol "Ru". There are no true synonyms for elemental symbols.

Notes

• "Ru" is a chemical symbol and is always capitalized.
• It is not typically used in general language or idiomatic expressions. Its meaning is fixed within scientific nomenclature.
• In non-scientific contexts, "ru" could be an abbreviation for other terms (e.g., "are you" in informal digital communication), but as a defined word in this context, it refers solely to the chemical element.

Noun

1. a rare polyvalent metallic element of the platinum group; it is found associated with platinum