Today, 185 years ago, Dmitri Mendeleyev was born, known primarily for having the clear vision of grouping chemical elements according to their atomic weight and properties, and elaborating the first version of the Periodic Table, formed at that time by 63 elements. However, his genius lies not only in this idea but also in many other things such as his intuition, since he predicted that there were missing elements to be discovered and he left some gaps in it to introduce them in the future by predicting the properties they should have.