Silicon By. angel bone

Element Symbol- Si
Element Name- Silicon
Atomic Number- 14
Protons- 14, Neutrons- 14.0855, Electrons- 14
Atomic Mass- 28.0855
Solid, Liquid or Gas? Solid.
Metal, Nonmetal or Metalloid? Semi-Metallic.
Who discovered it? Jons Jacob Berzelius
When? 1824.
How is it used? as a structural material.
Physical Properties- 1. density of solid: 2330 Kg m-3 2.molar volume: 12.06 cm3 3. thermal conductivity: 150 W m-1 k-1
Chemical Properties- 1. melting point: 1687 [1414c(2577f)]k 2. boiling point:[2900c(5252f)]k 3. enthalpy of fusion: 50.2 kJ mol-1
Unusual Facts- 1. Silicon is important in both plants and animal life. 2. Silicon is found in minerals such as ashestos, feldspar, clay and mica. 3. Silicon is present in the sun and stars and is a principal component of a class of meteorities known as aerolites.

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