You can use the Ion
class to work with ions instead of elements. Ions can be created from elements and charge information.
from mendeleev.ion import Ion
fe_2 = Ion("Fe", 2)
You can access variety of properties of the ion
fe_2.charge
fe_2.electrons
fe_2.Z
fe_2.name
you can also print the unicode ion symbol
fe_2.unicode_ion_symbol()
Ionic radii for this ion are available under radius
attribute
fe_2.radius
Appropriate value of ionization energy and electron affinity are available under ie
and ea
attributes
fe_2.ie
fe_2.ea
compute ionic potential
fe_2.ionic_potential()