Explain the differences between solids and liquids concerning molecular arrangement and intermolecular forces.

Here's how solids and liquids differ based on the given properties:

• i) Molecular arrangements

  • Solids: Particles are arranged in fixed, regular patterns (lattices) and are closely packed. They can only vibrate about their mean positions.
  • Liquids: Particles are closely packed but are randomly arranged and can move past one another.

• ii) Intermolecular forces

  • Solids: Have very strong intermolecular forces, which hold the particles firmly in their fixed positions.
  • Liquids: Have weaker intermolecular forces compared to solids, allowing particles to slide past each other, but still strong enough to keep them together.