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Chemical element with the atomic number of 37

All edits by  Sergey Kostin 

Edits on 8 Feb, 2022
Sergey Kostin
Sergey Kostin edited on 8 Feb, 2022
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Robert Wilhelm Bunsen

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Sergey Kostin
Sergey Kostin edited on 8 Feb, 2022
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Rubidium (chemical symbol - Rb, from Lat. Rubidium) is a chemical element of the 1st group (according to the outdated classification - the first group of the main subgroup, IA), the fifth period of the periodic system of chemical elements of D. I. Mendeleev, with atomic number 37.

The simple substance rubidium is a soft, low-melting alkali metal of silvery-white color[4].


Metallic rubidium has similarities with metallic potassium and metallic caesium in appearance, softness and conductivity[5]. Rubidium should not be stored outdoors, as a reaction will occur with the release of a large amount of heat, sometimes even leading to ignition of the metal[6]. Rubidium is the first alkali metal in the group whose density is higher than that of water, so it sinks, unlike the metals above it in the group.

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