Silicon is a A. Semiconductor B. Insulator C. Non-conductor D. Conductor

Semiconductor
Insulator
Non-conductor
Conductor

Silicon is a semiconductor.

A semiconductor is a material that has electrical conductivity between that of a conductor and an insulator. Semiconductors are used in many electronic devices, such as computers, cell phones, and solar cells.

Insulators are materials that do not allow electricity to flow through them. Conductors are materials that allow electricity to flow through them easily.

Non-conductors are materials that do not allow electricity to flow through them at all.