---
title: "A student investigates the physical properties of three solid substances, \\(X\\), \\(Y\\), and \\(Z\\), at \\(25\\ ^\\circ\\text{C}\\) and \\(1\\text{ atm}\\). The results of the investigation are recorded in the table below.  | Substance | Melting point (\\(^\\circ\\text{C}\\)) | Electrical conductivity (solid) | Electrical conductivity (liquid) | Mechanical behavior | | — | — | — | — | — | | \\(X\\) | \\(115\\) | Nonconductive | Nonconductive | Brittle | | \\(Y\\) | \\(801\\) | Nonconductive | Conductive | Brittle | | \\(Z\\) | \\(1085\\) | Conductive | Conductive | Malleable |  Based on the data in the table, which of the following correctly classifies the primary type of bonding in substances \\(X\\), \\(Y\\), and \\(Z\\)?"
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url: "https://nerd-notes.com/ubq/119611/"
date_modified: "2026-08-21T08:11:46+00:00"
---

# A student investigates the physical properties of three solid substances, \(X\), \(Y\), and \(Z\), at \(25\ ^\circ\text{C}\) and \(1\text{ atm}\). The results of the investigation are recorded in the table below.

| Substance | Melting point (\(^\circ\text{C}\)) | Electrical conductivity (solid) | Electrical conductivity (liquid) | Mechanical behavior |
| — | — | — | — | — |
| \(X\) | \(115\) | Nonconductive | Nonconductive | Brittle |
| \(Y\) | \(801\) | Nonconductive | Conductive | Brittle |
| \(Z\) | \(1085\) | Conductive | Conductive | Malleable |

Based on the data in the table, which of the following correctly classifies the primary type of bonding in substances \(X\), \(Y\), and \(Z\)?

A student investigates the physical properties of three solid substances, \(X\), \(Y\), and \(Z\), at \(25\ ^\circ\text{C}\) and \(1\text{ atm}\). The results of the investigation are recorded in the table below.

| Substance | Melting point (\(^\circ\text{C}\)) | Electrical conductivity (solid) | Electrical conductivity (liquid) | Mechanical behavior |
| --- | --- | --- | --- | --- |
| \(X\) | \(115\) | Nonconductive | Nonconductive | Brittle |
| \(Y\) | \(801\) | Nonconductive | Conductive | Brittle |
| \(Z\) | \(1085\) | Conductive | Conductive | Malleable |

Based on the data in the table, which of the following correctly classifies the primary type of bonding in substances \(X\), \(Y\), and \(Z\)?

- **A.** \(X\) is ionic, \(Y\) is metallic, and \(Z\) is covalent.
- **B.** \(X\) is metallic, \(Y\) is covalent, and \(Z\) is ionic.
- **C.** \(X\) is covalent, \(Y\) is ionic, and \(Z\) is metallic.
- **D.** \(X\) is covalent, \(Y\) is metallic, and \(Z\) is ionic.

*The answer key and step-by-step explanation are available to logged-in users at https://nerd-notes.com/ubq/119611/*