Atomic Number of Rubidium

Rubidium Atomic Number

Atomic Number of Rubidium is 37.

Chemical symbol for Rubidium is Rb. Number of protons in Rubidium is 37. Atomic weight of Rubidium is 85.4678 u or g/mol. Melting point of Rubidium is 39 °C and its the boiling point is 688 °C.

» Boiling Point » Melting Point » Abundant » State at STP » Discovery Year

About Rubidium

Rubidium is a soft and quite reactive metal. It easily reacts with water and air. Its name is derived from a Latin word meaning a deep red color. This element is non-toxic and it has no biological importance but it can be found in our body is really very small amounts. Its properties in living organisms are similar to the ones of potassium. In nature, rubidium is found in some minerals like leucite, carnalite, and others, and it is among 25 most common chemical elements on the surface of our planet. Rubidium creates a few compounds with other chemical elements, but it is used rather for research than in industry.

Properties of Rubidium Element

Atomic Number (Z)37
Atomic SymbolRb
Atomic Weight85.4678 u
Density1.532 g/cm3
Melting Point (K)312.46 K
Melting Point (℃)39 °C
Boiling Point (K)961 K
Boiling Point (℃)688 °C
Heat Capacity0.363 J/g · K
Abundance90 mg/kg
State at STPSolid
DescriptionAlkali metal
Electronegativity (Pauling) χ0.82
Ionization Energy (eV)4.17713
Atomic Radius235pm
Covalent Radius211pm
Valence Electrons1
Year of Discovery1861
DiscovererBunsen and Kirchhoff

What is the Boiling Point of Rubidium?

Rubidium boiling point is 688 °C. Boiling point of Rubidium in Kelvin is 961 K.

What is the Melting Point of Rubidium?

Rubidium melting point is 39 °C. Melting point of Rubidium in Kelvin is 312.46 K.

How Abundant is Rubidium?

Abundant value of Rubidium is 90 mg/kg.

What is the State of Rubidium at Standard Temperature and Pressure (STP)?

State of Rubidium is Solid at standard temperature and pressure at 0℃ and one atmosphere pressure.

When was Rubidium Discovered?

Rubidium was discovered in 1861.