Scientist who have a chemical element named after them

There are only four elements that were named after actual scientists.
   Curium [Cm] is named after Marie and Pierre Curie. The Curies worked extensively on radioactive elements so another scientist appropriately named this radioactive element after them.
   Einsteinium [Es] is named after the famed physicist Albert Einstein.
   Lawrencium [Lr or Lw] is named after Ernest Lawrence, who invented a machine to detect radioactivity. Lawrencium is a radioactive element.     Mendelevium [Md] is named after Dimitri Mendeleef who created the modern day periodic table.

Distance and velocity graph

Perimeter? wheres the answers