Describe the atomic theory of elasticity.
The atoms or molecules are bounded by interatomic and intermolecular forces and are in stable equilibrium whenever a perfect state is acquired. In a perfect equilibrium state, the separation is such that the net interatomic intermolecular force is zero. When a body is heated, cooled or any physical factors leads to any change in its state, the distance between the two atoms or molecules increases and attractive force comes into play. When the separation between the atoms or molecules decreases the repulsive force comes into play.
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