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).
Well usually elements in a periodic table are arranged into groups based on a set of repeating properties. However, Mendeleev arranged the elements in his periodic table in â¦ order of increasing atomic mass. Mendeleev arranged the elements in the increasing order of atomic masses and repeating periodic properties.They were arranged by the element's atomic mass. (lowest to highest) He arranged the elements in the increasing order of their atomic masses and repeating periodic properties.+ 31 others found this useful.mitri Mendeleev discovered scandium, gallium, technetium, and  germanium. He also predicted the existence of more elements and  developed the modern periodic table.