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Miscellaneous`ChemicalElements`
Basic properties of the chemical elements.
This loads the package.
In[1]:= <<Miscellaneous`ChemicalElements`
This gives the atomic weight of tungsten using the data in the package.
In[2]:= AtomicWeight[Tungsten]
Out[2]= 
If you ask for the atomic weight of an unstable element, Mathematica prints a warning message.
In[3]:= AtomicWeight[Plutonium]
AtomicWeight::unstable: No stable isotope of Plutonium exists.
Out[3]= 
This switches off the warning message.
In[4]:= Off[AtomicWeight::unstable]
Here is a plot of the ratio of atomic weight to atomic number for all the elements.
In[5]:= ListPlot[ AtomicWeight[Elements]/
AtomicNumber[Elements],
PlotJoined -> True]
Physical properties of chemical elements.
The densities given are usually for the elements at  Kelvin. 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]
Density::temp: Density is for Nitrogen at 21 Kelvin.
Out[7]= 
This thermal conductivity is for the gaseous state.
In[8]:= ThermalConductivity[Nitrogen]
ThermalConductivity::form: Thermal conductivity is for the gaseous form of 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]= 
THIS IS DOCUMENTATION FOR AN OBSOLETE PRODUCT. SEE THE DOCUMENTATION CENTER FOR THE LATEST INFORMATION. | 
