Essential Chemistry for IGCSE - Structure And Bonding (Section 3 - No. 13)
Why does silicon dioxide (SiO2) have a high melting point?
Because it has weak intermolecular forces.
Because it has a giant covalent structure with strong bonds.
Because it is a small molecule.
Because it contains ionic bonds.
Explanation
Silicon dioxide has a giant covalent structure with many strong covalent bonds.
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