Silicon (Si) is a chemical element with atomic number 14. The most common silicon isotope is ²⁸Si, with 14 protons and 14 neutrons.

Silicon is a semiconductor which is used in transistors, and transistors are an instrumental building block in computers, hence the name of the famous California tech hub − Silicon Valley.

The MOSFET transistor, which is typically made of silicon, is actually the most mass produced device in human history, with several sextillion of them being produced since their invention in 1959.

Silicon can be spelled using element symbols: Si - Li - Co - N.