Here you can read more about the chemical element Rubidium. Its shemical symbol is Rb and its atomic number is 37. The relative atomic mass of Rubidium is 85.4678 u. The elemental classification of Rubidium is Alkali metals, and it belongs to group 1 and period 5 in the Periodic Table of Elements.
The density of Rubidium is 1530 kg/m3. And the mineral hardness of Rubidium is 0.3 Mohs. The melting point of Rubidium is 312 Kelvin (39 ℃). The boiling point of Rubidium is 974 Kelvin (701 ℃). Rubidium was discovered in the year 1861 by Robert Bunsen and Gustav Kirchhoff.
To the right (or below if you are using a mobile device with a smaller screen) you will find the information given above for the element Rubidium ordered in tabular form, which might be easier to read and use if you want to quantify it in some sort.