How do the forces within and between molecules in small molecular substances differ?
Each molecule has strong covalent bonds within it, but weak intermolecular forces act between molecules.
AQA GCSE Combined Science: Trilogy (8464) — Chemistry — Higher · 5.2.2.4
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How do the forces within and between molecules in small molecular substances differ?
Each molecule has strong covalent bonds within it, but weak intermolecular forces act between molecules.
Why do small molecular substances usually have low melting and boiling points?
The intermolecular forces between their molecules are weak.
What physical states are many small molecular substances in at room temperature?
They are gases or liquids.
What happens to the forces and bonds in a small molecular substance when it melts or boils?
Energy overcomes intermolecular forces, allowing molecules to move more freely. The covalent bonds within the molecules remain intact.
How does molecular size affect the melting and boiling points of small molecular substances?
Larger molecules have stronger intermolecular forces, so they tend to have higher melting and boiling points.
Why do small molecular substances not conduct electricity?
Their molecules are neutral, and they contain no mobile charged particles to carry an electric current.