A soft, silvery, malleable and ductile metal that belongs to the rare-earth metals. It has the atomic number 59 and is the third member of the lanthanide series. Praseodymium has magnetic, electrical, chemical, and optical properties. It is too reactive to be found in native form, and pure praseodymium metal slowly develops a green oxide coating when exposed to air.

Praseodymium is a chemical element !

Praseodymium is a solid metal.

Praseodymium has six electron shells.

that doesn't exist nor is that a word

Actually, Praseodymium is an element on the periodic table of elements. There for a word. And to answer the question, Praseodymium is a silver-white color.