General Science


  • A hard and lustrous silvery-white metallic chemical element whose atomic number is 44. It has over 25 known isotopes, of which 7 are stable. It is utilized as a hardener for platinum, improves the corrosion-resistance of titanium, and is used in contacts, filaments, analytical instruments, and solar cells. Its chemical symbol is Ru.
  • chemical symbolRu

Information & Library Science

  • abbreviation in Internet addresses, the top-level domain for Russian Federation