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Rubidium (Rb): Properties, Uses and Periodic Table Guide

Periodic Table Guide

Rubidium (Rb) has atomic number 37 and is classified as a alkali metal. It sits in Group 1, period 5 of the periodic table. Its practical relevance includes research, atomic-frequency standards, specialty glass and photoelectric applications.

ELEMENT DATA

Quick facts

#Atomic number37
AaSymbolRb Relative
◉Atomic mass85.4678 State at room temperature Solid
⌘Group1

Position in the periodic table

Alkali metals are highly reactive s-block metals with one valence electron. Their chemistry is dominated by +1 oxidation states, and they require careful handling because several react vigorously with air or water.

Rubidium belongs to period 5. Its position helps explain recurring trends such as atomic size, bonding behavior, oxidation states and the way it interacts with neighboring elements.

Why Rubidium matters

In engineering and technology, rubidium is associated with research, atomic-frequency standards, specialty glass and photoelectric applications. The importance of the element may come from the pure element itself, from compounds containing it, or from its role as an alloying, electronic, catalytic or nuclear material.

Engineering and scientific context

Material behavior should never be inferred from the element name alone. Purity, isotope composition, crystal structure, processing history, temperature and the surrounding chemical environment can all change performance. In alloys and compounds, the contribution of rubidium depends on concentration and interaction with the other constituents.

Safety and handling

The hazards associated with Rubidium depend on its physical form, purity, compounds, process temperature and exposure route. Engineering decisions should use the applicable safety data sheet and project-specific risk assessment.

Related elements

Hydrogen (H) · Lithium (Li) · Sodium (Na) · Krypton (Kr)

Reference sources

For authoritative element data and current standard atomic-weight guidance, consult the Royal Society of Chemistry Periodic Table and the IUPAC Periodic Table of the Elements.


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