Silicon is a chemical element, meaning it's a pure substance that can't be broken down into simpler substances. So, silicon is made out of... silicon!

It's like asking what water is made of – it's made of water!

However, we can look at the atoms that make up silicon:

* Silicon atoms are the building blocks of silicon. These atoms have a specific structure with 14 protons, 14 neutrons, and 14 electrons.

So, while silicon itself is a pure element, it's ultimately made of silicon atoms.