Glass
Glass is made by melting sand.
Major
component
silica / silicon dioxide SiO2
Silica is found abundantly in sand.
Bonding 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
Kaca
Kaca dibuat
daripada pasir.
Komponen
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.
Bentuk
struktur: Tetrahedron
Sifat-sifat
lut sinar
pengalir elektrik and haba
keras
rapuh
tak telap cecair
lengai (secara kimia)
