AP Chemistry
3.2 Properties of Solids
A student tests four unknown crystalline solids in the laboratory to classify their bonding types and structures. The student records the observations and data in the table below.
| Substance | Melting point (
\(^ \circ\text{C}\)) | Electrical conductivity (solid) | Electrical conductivity (liquid) |
| :--- | :--- | :--- | :--- |
| W | \(801\) | Nonconductor | Good conductor |
| X | \(1085\) | Good conductor | Good conductor |
| Y | \(1710\) | Nonconductor | Nonconductor |
| Z | \(115\) | Nonconductor | Nonconductor |
Based on the data in the table, which of the following correctly identifies one of the substances and provides the valid structural justification?
| Substance | Melting point (
\(^ \circ\text{C}\)) | Electrical conductivity (solid) | Electrical conductivity (liquid) |
| :--- | :--- | :--- | :--- |
| W | \(801\) | Nonconductor | Good conductor |
| X | \(1085\) | Good conductor | Good conductor |
| Y | \(1710\) | Nonconductor | Nonconductor |
| Z | \(115\) | Nonconductor | Nonconductor |
Based on the data in the table, which of the following correctly identifies one of the substances and provides the valid structural justification?
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