EXPLAIN WHY THE MELTING OF SILICON DIOXIDE IS HIGHER THAN THE MELTING POINT OF SODIUM CHLORIDE
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The melting point of silicon dioxide is higher than the melting point of sodium chloride because the covalent bond between them is the strongest.
Explanation:
Sodium chloride is an ionic compound while silicon dioxide is a molecular compound. Despite being a molecular compound, silicon dioxide has a giant structure and a lot of energy is needed to break the strong covalent bonds in three dimensions. Silicon dioxide has an extended covalent structure in which each silicon atom is bonded to four oxygen atoms. So the melting point of silicon dioxide is higher than the melting point of sodium chloride.
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