This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)


ElementData["name", "property"]
gives the value of the specified property for the chemical element "name".
ElementData[n, "property"]
gives the specified property for the n^(th) chemical element.
  • Chemical elements can be specified by their full names, standard abbreviations or atomic numbers.
  • ElementData[] gives a list of all standard chemical elements.
  • ElementData[n] gives the full name of the n^(th) chemical element.
  • ElementData["Properties"] gives a list of all properties available for chemical elements.
  • Properties that do not apply or are not known in a particular case are indicated by Missing[...].
  • Except where noted, all relevant quantities are given in SI (MKS) units. ElementData["name", "prop"] gives the numerical value; ElementData["name", "prop", "Units"] gives the units used.
  • Numerical values that are known only to a certain precision are typically tagged with their precision, and given in arbitrary-precision form.
  • Basic element properties include:
"AtomicNumber"atomic number Z
"AtomicWeight"average atomic weight in atomic mass units
  • If no other temperature or pressure is specified, all macroscopic properties are given for standard temperature and pressure. When applicable, properties are for the most stable form of the element at standard temperature and pressure.
  • Material properties include:
"BrinellHardness"Brinell indentation hardness
"BulkModulus"bulk modulus (incompressibility) K
"Density"density at standard temperature and pressure
"LiquidDensity"liquid density at melting point
"MohsHardness"Mohs scratch resistance
"MolarVolume"molar volume
"PoissonRatio"Poisson ratio nu of solid
"ShearModulus"shear modulus G of solid
"SoundSpeed"speed of sound
"ThermalConductivity"thermal conductivity kappa
"ThermalExpansion"linear thermal expansion coefficient alpha
"VickersHardness"Vickers indentation hardness
"YoungModulus"Young's modulus E of solid
  • Thermodynamic properties include:
"AbsoluteBoilingPoint"boiling temperature in kelvin
"AbsoluteMeltingPoint"melting temperature in kelvin
"AdiabaticIndex"gas phase adiabatic index gamma
"BoilingPoint"boiling temperature in degrees Celsius
"CriticalPressure"pressure at liquid-gas critical point
"CriticalTemperature"temperature at liquid-gas critical point
"CuriePoint"Curie temperature at ferromagnet-paramagnet transition
"FusionHeat"latent heat for solid-liquid transition
"MeltingPoint"melting temperature in degrees Celsius
"NeelPoint"Néel temperature at antiferromagnet-paramagnet transition
"Phase"naturally occurring phase (e.g. "Solid")
"SpecificHeat"specific heat capacity c_p
"SuperconductingPoint"superconducting transition temperature in kelvin
"VaporizationHeat"latent heat for liquid-gas transition
  • Electromagnetic and optical properties include:
"Color"basic material color
"ElectricalConductivity"electrical conductivity sigma
"ElectricalType"electrical type (e.g. "Insulator")
"MagneticType"magnetic response type (e.g. "Paramagnetic")
"MassMagneticSusceptibility"mass magnetic susceptibility chi
"MolarMagneticSusceptibility"molar magnetic susceptibility chi_m
"RefractiveIndex"refractive index for visible light
"Resistivity"electrical resistivity rho of solid
"VolumeMagneticSusceptibility"volume magnetic susceptibility chi_v
  • Abundance properties include (specified by mass-fraction):
"CrustAbundance"Earth's crust abundance
"HumanAbundance"typical human body abundance
"MeteoriteAbundance"observed carbonaceous meteorite abundance
"OceanAbundance"ocean abundance
"SolarAbundance"abundance in the sun
"UniverseAbundance"observed universe abundance
  • Periodic table properties include:
"Block"label of outermost occupied electron subshell
"Group"column in periodic table
"Period"row in periodic table (number of electron shells)
  • Basic chemical properties include:
"AllotropicMultiplicities"numbers of atoms in allotropic molecules
"CommonCompoundNames"names of common compounds
"ElectronAffinity"electron affinity
"Electronegativity"Pauling electronegativity
"GasAtomicMultiplicities"number of atoms in gas-phase molecules
"Valence"number of chemical bonds typically formed
  • Crystallographic properties for the most stable solid phase include:
"CrystalStructure"basic crystal lattice structure
"LatticeAngles"angles between crystallographic axes {alpha,beta,gamma}
"LatticeConstants"crystal lattice constants {a,b,c}
"SpaceGroupNumber"International Tables space group number
"SpaceGroupName"space group symbol
  • Atomic properties include:
"AtomicRadius"calculated distance from nucleus of outermost electron
"CovalentRadius"half-distance between nuclei in a bonded pair of atoms
"ElectronConfiguration"occupation numbers for each electron subshell
"ElectronConfigurationString"electron configuration written in standard notation
"ElectronShellConfiguration"occupation numbers for each complete energy shell
"IonizationEnergies"list of ionization energies for each electron
"QuantumNumbers"ground state angular momentum quantum numbers
"VanDerWaalsRadius"hard sphere interatomic interaction range
  • Nuclear properties include:
"DecayMode"dominant decay mode for longest-lived isotope
"HalfLife"half-life in seconds for longest-lived isotope
"IsotopeAbundances"list of mass numbers and abundances of stable isotopes
"KnownIsotopes"atomic mass numbers of all known isotopes
"Lifetime"exponential lifetime in seconds for longest-lived isotope
"NeutronCrossSection"thermal neutron cross section in barns
"NeutronMassAbsorption"thermal neutron mass absorption coefficient
"Radioactive"whether the element is radioactive
"StableIsotopes"atomic mass numbers of stable isotopes
  • Names-related properties include:
"Abbreviation"standard element abbreviation (e.g. "Na")
"Allotropes"names of allotropes (e.g. "Graphite")
"AlternateNames"alternate names (e.g. "Aluminium")
"CASNumber"Chemical Abstract Service registry number
"IconColor"icon color for Mathematica molecular graphics
"Name"English name (e.g. "hydrogen")
"StandardName"standard Mathematica name (e.g. "Hydrogen")
  • Historical and commercial properties include:
"DiscoveryCountries"countries where element was discovered
"DiscoveryYear"year element was discovered
  • ElementData["class"] gives a list of elements in the specified class. ElementData[name, "class"] gives True or False depending on whether the element corresponding to name is in the specified class.
  • Classes of elements include:
"AlkaliMetal"alkali metal
"Gas"gas at standard temperature and pressure
"Liquid"liquid at standard temperature and pressure
"Ferromagnetic"ferromagnetic at standard temperature and pressure
"Natural"naturally occurring
"NobleGas"noble gas
"Radioactive"radioactive in all forms
"Solid"solid at standard temperature and pressure
"Stable"stable with respect to radioactive decay
"Synthetic"occurring only when synthesized
  • ElementData["name", "property", "ann"] gives various annotations associated with a property. Typical annotations include:
"Description"short textual description of the property
"Interval"uncertainty range given by Interval[...]
"LongDescription"longer textual description of the property
"Note"additional information about the property
"Units"units in which the property is given
"UnitsName"English name for the units used
"UnitsNotation"notation for the units used
"UnitsStandardName"Mathematica standard name for the units used
Find the atomic weight of carbon:
Click for copyable input
Find the thermal conductivity of tungsten (in SI units):
Click for copyable input
Plot the melting points (in degrees Celsius) of elements as a function of atomic number:
Click for copyable input
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