Silicon is a chemical element with the symbol Si and atomic number 14. It's not a compound made of multiple elements.

Here's a breakdown:

* Atomic Structure: Silicon has 14 protons, 14 neutrons (in its most common isotope), and 14 electrons.

* Elemental Form: In its purest form, silicon exists as a shiny, hard, brittle metalloid.

* Occurrence: It's the second most abundant element in the Earth's crust, found primarily in compounds like silica (SiO2) and silicates.

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