chemical reactivity is a property of elements and includes ordered values of reactive / unreactive
chemical_property is property. chemical_reaction is chemical_interaction. chemical_object_chemical_object is chemical_object. hydrophilic_chemical_object is chemical_object. reactant is chemical. volatility is chemical_property. chemical_analysis is analysis. atom is chemical_object. chemical_equilibrium is chemical_reaction. organic_chemical_object is chemical_object.