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Glass

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Glass is made by melting sand.
   
Major component
   
silica / silicon dioxide SiO2

Silica is found abundantly in sand.
   
B
onding structure:
Every Si atom is bonded (covalent bonding) to 4 oxygen (O) atoms. Every O atom is bonded to 2 Si atoms
   
Shape of structure: Tetrahedral
   
Properties

transparent
electrical and heat insulator
hard
brittle
impermeable to liquid
chemically inert


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Kaca

     
Kaca dibuat daripada pasir.
         
K
omponen utama:
silika / silikon dioksida SiO2

   
Struktur ikatan
Setiap atom Si diikat secara kovalen kepada 4 atom oksigen (O). Setiap atom O pula diikat kepada 2 atom Si.
Silika banyak didapati dalam pasir.
 
Ben
tuk struktur: Tetrahedron

Sifat-sifat

lut sinar
pengalir elektrik and haba
keras
rapuh
tak telap cecair
lengai (secara kimia)
 

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