Look at where the notes fall on the first three frets of the guitar, then the next five, and then the next four. The first string position being âopen,â the first four frets of the guitar neck are shown. The notes of the fourth through eighth frets.
The greatness of Mendeleev was that not only did he leave spaces for elements that were not yet discovered but he predicted properties of five of these elements and their compounds. How foolish he would have seemed if these predictions had been incorrect but fortunately for him three of these missing elements were discovered by others within 15 years (ie within his lifetime).
Using his periodic table, Mendeleev predicted the existence and properties of new chemical elements. When these elements were discovered, his place in the history of science was assured.he reason Mendeleev became the leader of the pack was probably because he not only showed how the elements could be organized, but he used his periodic table to: 1  Propose that some of the elements, whose behavior did not agree with his predictions, must have had their atomic weights measured incorrectly.