Compounds and Bonding

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Compounds and Bonding


SiC forms a covalent network with each atom obtaining the ‘noble gas configuration’ of electrons by sharing 4 outer electrons. It is a lattice as there is a regular repeating pattern in the structure. Every C is bonded to 4 Si, every Si is bonded to 4 C, so there is an equal number of each 4:4 Si to C which simplifies to the formula SiC.


SiO2 forms a covalent network with oxygen that is hollow, as it is not the same because there is not a complete lattice.



Carborundum (SiC)

Silica (Si2) 

Melting Point

Around 2700oC, covalent network, strong bonds


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