We just learned about the metal Silver
Another chemical element is Silicon, called "Si" for short on the Periodic Table.
Silicon is a type of rock that is kind of like a metal and kind of not.
The words for rocks like that is metalloid.
We learned before that silicon is a semiconductor which means it is ok but not great at letting electricity go through it.
(from: wikipedia - silicon)
Kid Facts - Blast from the past: Superconductor