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.
Mendelevium: the essentials. Mendelevium is a radioactive rare earth metal named after Dmitri Mendeleev, father of the Periodic Table. Mendelevium: historical information. Mendelevium was discovered by Glenn T. Seaborg, Albert Ghiorso, Bernard Harvey, Gregory Choppin, Stanley G. Thompson in 1955 at USA. Origin of name: named after Dimitri Mendeleev, the Russian chemist who contributed so much to the development of the periodic table.