Selenium Element Cube Subscriptions or ferrocerium rods

or ferrocerium rods

where the element was discovered

"Do the difficult things while they are easy and do the great things while they are small

The Noble Gas Display contains glass vacuum ampules with small amounts of Helium

Selenium Element Cube Subscriptions or ferrocerium rodsSelenium's atomic number is 34 and its symbol is Se. Selenium is a nonmetal that has three common allotropes which are metallic gray, red, or glassy black. It is produced as a byproduct when refining metal sulfide ores. Selenium is most commonly used as a pigment, although you might have also seen it listed as an ingredient in a supplementary vitamin.