Rubidium (Rb) Properties and Facts

Element 37 - Alkali Metal

What are the basic properties of Rubidium?

Rubidium (symbol: Rb) is a alkali metal with atomic number 37. Its atomic mass is 85.468 u, and it belongs to period 5 and group 1.

What is the electron configuration of Rubidium?

The electron configuration is: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 5s¹

What are the physical properties of Rubidium?

Melting point: 312.45 K
Boiling point: 961.0 K
Density: 1.532 g/cm³

What are the known isotopes of Rubidium?

  • Rb-85: 72.17% abundance
  • Rb-87: 27.83% abundance

What is the biological role and occurrence of Rubidium?

Biological role: No known biological role
Natural occurrence: Found in minerals like lepidolite

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