Non-mosaic Down syndrome is a genetic disorder. Most people with non-mosaic Down syndrome have three copies of chromosome 21 in all of their cells (chromosome 21 trisomy); some have an extra copy of chromosome 21 attached to a different chromosome in all of their cells (chromosome 21 translocation).
Making the world better, one answer at a time. Stanislao Cannizzaro, an Italian chemist who worked with Dmitri, inspired Dmitri Mendeleev to come up with his creative ideas. Atomic Weight also inspired Mendeleev.
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.