Chemical element
Rubidium
- Rb
- Z = 37
- alkali metal
Rubidium (Rb) is element 37, a alkali metal in period 5 and group 1. Its standard atomic weight is 85.468 Da. Weights follow IUPAC standard atomic weights, 2021 revision.
Identity
SymbolRb
Standard atomic weight85.468atomic mass units (Da)
Mass in kilograms1.4192295 × 10^-25
Categoryalkali metal
Group1
Period5
Blocks-block
Electrons in a neutral atom37
Neutrons in the most common isotope48≈
Quantities
Molar mass85.468 g/mol
Mass of one mole85.468 grams
Atoms in one gram7.0460766 × 10^21
Mass of one atom1.4192295 × 10^-22 g
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