A Fuzzy Classification of the Chemical Elements

The fuzzy clustering algorithm is applied in order to obtain the cluster structure of the chemical elements, based on their physical, chemical, and structural properties. The results obtained with the fuzzy method are consistent with the chemical behavior of the elements and with the predictions based on their electronic structure. An IBM-PC computer has been used to run the corresponding program written in Pascal. Moreover, the results suggest some new untrivial relationships between chemical elements according to the gradual nature of their properties.