Rubidium

GPTKB entity

Statements (50)
Predicate Object
gptkbp:instanceOf gptkb:chemical_compound
gptkbp:abundanceInEarthsCrust 90 ppm
gptkbp:appearance silvery-white
gptkbp:atomicNumber 37
gptkbp:atomicWeight 85.4678
gptkbp:boilingPoint 688 °C
gptkbp:CASNumber 7440-17-7
gptkbp:category metal
alkali metal
gptkbp:crystalSystem body-centered cubic
gptkbp:density 1.532 g/cm³
gptkbp:discoveredBy gptkb:Gustav_Kirchhoff
gptkb:Robert_Bunsen
gptkbp:discoveredIn 1861
gptkbp:electronConfiguration [Kr] 5s1
gptkbp:electronegativity 0.82 (Pauling scale)
gptkbp:firstSpectroscopicallyIdentified 1861
gptkbp:flammability highly flammable
gptkbp:foundIn gptkb:carnallite
lepidolite
pollucite
https://www.w3.org/2000/01/rdf-schema#label Rubidium
gptkbp:isotopes gptkb:Rb-85
gptkb:Rb-87
gptkbp:IUPACName gptkb:Rubidium
gptkbp:magneticOrdering paramagnetic
gptkbp:meltingPoint 39.31 °C
gptkbp:molarHeatCapacity 31.06 J/(mol·K)
gptkbp:mostStableIsotope gptkb:Rb-85
gptkbp:namedAfter Latin 'rubidus' (deep red)
gptkbp:naturalOccurrence minerals
gptkbp:oxidationStates +1
gptkbp:period 5
gptkbp:phaseAtSTP gptkb:stone
gptkbp:producedBy reduction of rubidium compounds
gptkbp:radioactive gptkb:Rb-87
yes (Rb-87)
gptkbp:relatedGroup alkali metal
gptkbp:solubility reacts, not soluble as metal
gptkbp:standardState solid at 25°C
gptkbp:symbol Rb
gptkbp:thermalConductivity 58.2 W/(m·K)
gptkbp:toxicity low, but compounds can be hazardous
gptkbp:type reacts violently with water
gptkbp:uses gptkb:atomic_clocks
research
specialty glasses
gptkbp:bfsParent gptkb:Rb-85
gptkb:Mineral_Spa
gptkbp:bfsLayer 7