Question 1
Which statement correctly describes a key difference in electrical conductivity between ionic and covalent compounds?
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Chemistry · Unit 1 · Properties and structure of materials · Compounds and mixtures
Describe the properties of ionic, covalent and metallic compounds, e.g. melting and boiling point, thermal and electrical conductivity, strength and hardness.
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Question 2
A student compares three solid samples: sodium chloride (NaCl), copper metal (Cu), and silicon dioxide (SiO₂). Identify which sample has the highest melting point and explain how the bonding structure in that compound results in this property.
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