an element is identified by its number of protons
element_of_cone is element. each_element_in_periodic_table has number_associated_with chemical_element is element. each_element_in_periodic_table has not number_associated_with hydrogen_atoms has one_proton_and_one_electron protons is not component_of_atoms. identification_particle is atom. data_element is element. protons is component_of_atoms. isotope is atom.