Why do covalent compounds generally have low melting and boiling points?
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A.
They contain metallic bonds.
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B.
They have strong electrostatic forces.
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C.
They have a rigid lattice structure.
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D.
They have weak intermolecular forces.
Correct Answer:
D. They have weak intermolecular forces.
Explanation:
The correct answer is They have weak intermolecular forces.
Covalent compounds consist of molecules held together by weak intermolecular forces, such as London dispersion forces or dipole-dipole interactions, rather than the strong chemical bonds found within the molecules themselves. Because these attractions between neighboring molecules are relatively easy to overcome, only a small amount of thermal energy is required to transition the substance from a solid to a liquid or a liquid to a gas. Consequently, these substances typically exhibit lower melting and boiling points compared to ionic or metallic compounds, which are held together by much stronger electrostatic forces.
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