Welcome to the periodic table of the elements powered trail; which begins at Mount Henry Bridge and continues south down the freeway cycle path. Please stay safe and enjoy the power trail.
The periodic table of elements are those approved by the International Union of Pure & Applied Chemistry.
Praseodymium is soft, silvery, malleable, and ductile. It was prepared in relatively pure form in 1931. It is somewhat more resistant to corrosion in air than europium, lanthanum, cerium, or neodymium, but it does develop a green oxide coating that "spalls" away when exposed to air. The metal should be stored under an inert atmosphere or under mineral oil or petroleum. Source: Webelements
The original containers (placed by BlaKids & LouBla) are small tubes as shown here...
These containers have logbook inside them only, thus be sure to BYO pen.