Rubidium Element Properties

Rubidium

p36
Kr
Krypton
s37
Rb
Rubidium
s38
Sr
Strontium
General
Name(Rubidium)
Symbol(Rb)
Number(37)
Group Number(1)
Group(Alkali metals)
Block(s)
Density(1.53 g/cm3)
Atomic Weight(85.467 g/mol)
Atomic Volume(55.9 cm3/mol)
Discover(1861)


States
State(Solid)
Melting Point(312.46 K)
Boiling Point(961 K)
Triple Point(Nil)
Critical Point(2093 K)
Heat of Fusion(2.19 kJ/mol)
Heat of Vaporization(75.77 kJ/mol)


Energies
First Ionization Energy(403 kJ/mole)
Second Ionization Energy(2632.1 kJ/mole)
Third Ionization Energy(3859.4 kJ/mole)
Electronegativity(0.82)
Electron Affinity(46.885 kJ/mole)
Specific Heat(0.363 J/gK)
Heat Atomization(86 kJ/mole atoms)


Oxidation and Electrons
Shells(2,8,18,8,1)
Electron Configuration([Kr] 5s1)
Minimum Oxidation Number(0)
Maximum Oxidation Number(1)
Minimum Common Oxidation Number(0)
Maximum Common Oxidation Number(1)


Appearance and Characteristics
Crystal Structure(cubic body centered)
Characteristics(soft)
Color(silvery-white)
Uses(photocells)
Hardness(0.3 mohs)
Toxicity(None)


Reactions
Reaction with Air(vigorous, =>RbO2)
Reaction with 6M HCl(vigorous, =>H2, RbCl)
Reaction with 15M HNO3(vigorous,=>RbNO3, H2, NOx)
Reaction with 6M NaOH(vigorous, =>H2, RbOH)


Other Forms
Number of Isotopes(2)
Hydride(RbH)
Oxide(Rb2O)
Chloride(RbCl)


Radius
Atomic Radius(248 pm)
Ionic Radius (1+ ion)(166 pm)
Ionic Radius (1- ion)(Nil)
Ionic Radius (2+ ion)(Nil)
Ionic Radius (2- ion)(Nil)
Ionic Radius (3+ ion)(Nil)


Conductivity
Thermal Conductivity(58.2 J/m-sec-deg)
Electrical Conductivity(77.9 1/mohm-cm)
Polarizability(47.3 A3)


Abundance
Source(Li extractn by-product)
Relation Abundance Solar System(0.851 log)
Abundance Earths Crust(2 log)


p36
Kr
Krypton
s37
Rb
Rubidium
s38
Sr
Strontium

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