Silicon
METALLOID
Phase: Solid
Discovered: Jöns Jacob Berzelius
Block: P
Summary
Silicon is a chemical element with symbol Si and atomic number 14. It is a tetravalent metalloid, more reactive than germanium, the metalloid directly below it in the table. Controversy about silicon's character dates to its discovery.
Source: WikipediaPhysical Properties
Atomic Mass 28.085 u
Density 2.329 g/cm³
Melting Point 1687 K
Boiling Point 3538 K