Metalloid

6 elements

Essential for plant growth and used in fiberglass. Boron nitride is harder than ...

The second most abundant element in Earths crust after oxygen. The foundation of...

A semiconductor used in early transistors before silicon became dominant. Still ...

Famous as a historical poison. Arsenic trioxide was called inheritance powder. C...

Used in ancient Egypt as kohl eye makeup. Flame retardant in plastics and textil...

Named after Tellus, the Latin word for Earth. One of the rarest elements in Eart...