• Name: Rubidium

  • Symbol: Rb

  • Number of Energy Levels: 5

  • Electrons on the outer energy level: 1

  • Atomic Number: 37

  • Atomic Mass: 85.4678 Amu

  • Protons / Electrons: 37

  • Neutrons: 48

  • Density: 1.532 g/cm3

  • Classification: Alkali Metal

Top 13 interesting facts about Rubidium

  • Rubidium was discovered in 1861 by the German chemists Robert Bunsen and Gustav Kirchhoff. Its name derives from the Latin word "rubidius" which means "red".
  • Rubidium's boiling point is at 688.0 C (961.15 K, 1270.4 F) and its melting point is at 38.89 C (312.04 K, 102.002 F).
  • Rubidium's color is metallic silver-white.
  • Elemental rubidium is soft, ductile, and very reactive.
  • Rubidium's reaction with water is very violent and can causes fire.
  • Rubidium has only one stable isotope, 85-Rb.
  • Rubidium is not a necessary element for living organisms.
  • Rubidium chloride is the most used rubidium compound.
  • Rubidium is also used in dating rocks.
  • Rubidium is the 23rd most abundant element in Earth's crust (similar to zinc and cooper).
  • Bernic Lake in Canada and Island of Elba in Italy are two important sources of rubidium.
  • Just 2 to 4 tones of rubidium are produced annually mainly at the locations mentioned above which are important sources of cesium as well.
  • Rubidium is kept under a dry mineral oil or sealed in glass ampules in an inert atmosphere.