Radium Element Properties

Radium

s87
Fr
Francium
s88
Ra
Radium
f89
Ac
Actinium
General
Name(Radium)
Symbol(Ra)
Number(88)
Group Number(2)
Group(Alkali earth metals)
Block(s)
Density(5 g/cm3)
Atomic Weight(226.0254 g/mol)
Atomic Volume(45.20 cm3/mol)
Discover(1898)


States
State(Solid)
Melting Point(973 K)
Boiling Point(2010 K)
Triple Point(Nil)
Critical Point(Nil)
Heat of Fusion(8.5 kJ/mol)
Heat of Vaporization(113 kJ/mol)


Energies
First Ionization Energy(509.4 kJ/mole)
Second Ionization Energy(979.1 kJ/mole)
Third Ionization Energy(Nil)
Electronegativity(0.9)
Electron Affinity(Nil)
Specific Heat(0.12 J/gK)
Heat Atomization(159 kJ/mole atoms)


Oxidation and Electrons
Shells(2,8,18,32,18,8,2)
Electron Configuration([Rn] 7s2)
Minimum Oxidation Number(0)
Maximum Oxidation Number(2)
Minimum Common Oxidation Number(0)
Maximum Common Oxidation Number(2)


Appearance and Characteristics
Crystal Structure(cubic body centered)
Characteristics(Radioactive, luminescent)
Color(white)
Uses(neutron source)
Hardness(Nil)
Toxicity(None)


Reactions
Reaction with Air(vigorous, =>RaO2, Ra3N2)
Reaction with 6M HCl(None)
Reaction with 15M HNO3(None)
Reaction with 6M NaOH(None)


Other Forms
Number of Isotopes(4)
Hydride(None)
Oxide(None)
Chloride(RaCl2)


Radius
Atomic Radius(Nil)
Ionic Radius (1+ ion)(Nil)
Ionic Radius (1- ion)(Nil)
Ionic Radius (2+ ion)(162 pm)
Ionic Radius (2- ion)(Nil)
Ionic Radius (3+ ion)(Nil)


Conductivity
Thermal Conductivity(18.6 J/m-sec-deg)
Electrical Conductivity(Nil)
Polarizability(38.3 A3)


Abundance
Source(pitchblende(U-238 decay))
Relation Abundance Solar System(Nil)
Abundance Earths Crust(-6 log)


s87
Fr
Francium
s88
Ra
Radium
f89
Ac
Actinium

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