Rubidium
Rubidium (Rb) is an alkali metal with atomic number 37 and atomic mass 85.4678 u. It has a very low melting point and is highly reactive.
Identity
- Name: Rubidium
- Symbol: Rb
- Atomic number: 37
- Atomic mass: 85.4678 u
Position in the periodic table
- Group: 1
- Period: 5
- Category: Alkali metal
Physico-chemical properties
- Standard state: Solid
- Melting point: 39.3 °C
- Boiling point: 688 °C
- Density: 1.532 g/cm³
- Electron configuration: [Kr] 5s¹
Scientific description
Rubidium is a highly reactive alkali metal. It ignites spontaneously in air and reacts violently with water, forming rubidium hydroxide and hydrogen.
KODO: K1