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they cannot conduct electricity in either state
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For the question you provided, here’s the breakdown:
1(a) Complete the table by providing the correct type of structure for each substance.
The completed table is as follows:
| Substance | Electrical conductivity: in solid state | Electrical conductivity: in liquid state | Melting point | Type of structure | | :-------- | :------------------------------------ | :------------------------------------- | :------------ | :---------------- | | A | Poor | Poor | Low | Simple molecular | | B | Poor | Poor | High | Giant covalent | | C | Good | Good | High | Metallic | | D | Poor | Good | High | Ionic |
1(b) Explain why:
1(b)(i) Substance A is a poor conductor in both solid and liquid states. Substance A has a simple molecular structure. These molecules lack free-moving ions or delocalized electrons to carry electric charge. Therefore, they cannot conduct electricity in either state.
1(b)(ii) Substance D conducts electricity in liquid state but not in solid state. Substance D has an ionic structure. In solid state, ions are fixed in place and cannot move. In liquid state (when melted), ions are free to move and can carry electric charge.
1(b)(iii) Give an example of a substance that would show similar properties to substance C. Substance C has a metallic structure. Metals have delocalized electrons that can move freely, allowing them to be good conductors of electricity in both solid and liquid states. Example: Copper.
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For the question you provided, here’s the breakdown: 1(a) Complete the table by providing the correct type of structure for each substance.
This languages problem is solved step by step below, with detailed explanations to help you understand the method and arrive at the correct answer.