April 2020
Intermediate to advanced
296 pages
5h 20m
English

Behold Se’s gray spiral chains, red ring stack’d Se8,
Consume enough (though not too much!), essential (toxic!) mate.
Like S above its compounds smell,
Yet in the light conducts quite well.
Its sulfide rings treat flaky scalp; red glass it helps create.
ess-ees ess-ee-eight
GROUP 16 NON-METAL
Selenium is found in two forms. The first is a silvery-gray, metal-like solid composed of spiral chains of selenium atoms. The second is a red, amorphous powder composed of individual rings of eight selenium atoms (Se8) stacked on top of each other.