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Question
Answer the following in brief.
Distinguish between ionic solids and molecular solids
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Solution
| Ionic solids | Molecular solids |
| 1. The constituent particles are charged ions (cations and anions). | 1. The constituent particles are monoatomic or polyatomic molecules |
| 2. The constituent particles are held by the electrostatic force of attraction between oppositely charged ions. | 2. The constituent particles are held by intermolecular forces of attractions such as London forces, dipole-dipole forces and/or hydrogen bonds. |
| 3. They are hard and brittle. | 3. They are soft. |
| 4. They have high melting points. | 4. They have low melting points. |
| 5. They are nonconductors of electricity in solid-state. However, they are good conductors when melted or dissolved in water. | 5. They are poor conductors of electricity. |
| 6. e.g. NaCl, CaF2, etc. | 6. Ice, benzoic acid, etc. |
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