This is documentation for Mathematica 5, which was
based on an earlier version of the Wolfram Language.

 Miscellaneous`ChemicalElements` Basic properties of the chemical elements. This loads the package. In[1]:= < True] Out[5]= Physical properties of chemical elements. The densities given are usually for the elements at Kelvin and one atmosphere pressure. A message is generated if the density given is for another temperature or for a special form of the element. The thermal conductivities are for the specified elements at Kelvin unless a message is returned giving an exception. This gives the heat of fusion of nitrogen. In[6]:= HeatOfFusion[Nitrogen] Out[6]= When you ask for the density, Mathematica warns you that this density is taken at a temperature of 21 Kelvin. The standard used for most other elements is 298 Kelvin. In[7]:= Density[Nitrogen] Out[7]= This thermal conductivity is for the gaseous state. In[8]:= ThermalConductivity[Nitrogen] Out[8]= Electronic structure of chemical elements. When you use ElectronConfiguration to get the electronic configuration of an element, the result is a list using the standard order of listing of subshells , , , . Each shell is grouped into a sublist. ElectronConfigurationFormat returns the number of electrons in each subshell along with the label for the subshell. This gives the electronic configuration as a list in the standard format. In[9]:= ElectronConfiguration[Actinium] Out[9]= This includes the orbital labels in the list. In[10]:= ElectronConfigurationFormat[Actinium] Out[10]= Ionization potential and specific heat of chemical elements. This gives the specific heat of potassium. In[11]:= SpecificHeat[Potassium] Out[11]= This gives the ionization potential of helium. In[12]:= IonizationPotential[Helium] Out[12]= Here is a plot of the ionization potential against the atomic number of the elements. In[13]:= (Off[IonizationPotential::unknown]; Off[Graphics::gptn];ListPlot[ IonizationPotential[Elements]/ElectronVolt, PlotJoined -> True, PlotRange -> All]) Out[13]= Abundances of the chemical elements. This gives the ten most abundant elements in the Solar System. In[14]:= (Off[SolarSystemAbundance::unknown];Take[Reverse[Sort[ Map[{ SolarSystemAbundance[#] /. Unknown->0, #}&, Elements]]], 10]) Out[14]=