Information about the element, Rubidium, atomic number 37. Covers physical properties, atomic properties, how abundant it is on the Earth, and details about health-related regulations.

The team at Periodicvideos has created a TED-Ed Lesson for every element of the periodic table. This one is about rubidium. Take this lesson to see it dropped in water! Yet another experiment in our "small metallic collider." [4:25]

This article explains what radioactive dating is and describes the different techniques used, what they are used for, and the limitations of each.

This subtable lists and describes the six alkali metals of the periodic table of Elements. Related links are provided.

Describes the physical and chemical properties of the six alkali metals.

Lists the properties of the alkali metal group of the periodic table and describes each of the six elements and their uses.

This site from ScienceWorld provides a short but factual biographical sketch of the German physicist, Gustav Kirchhoff and describes his most notable discoveries and contributions to the realm of science.