if the elements are in the same family , then the elements will share the same number of valence electrons
one_of_chemical_elements is nitrogen. valence_electron is electron. similarity is not sameness. similarity is sameness. valence_electron is not electron. isomorphism is similarity. one_of_chemical_elements is not hydrogen. one_of_chemical_elements is tungsten. one_of_chemical_elements is not tungsten. one_of_chemical_elements is not nitrogen.