When two atoms are at an equilibrium distance for bonding th

When two atoms are at an equilibrium distance for bonding, the sum of the repulsive and attractive forces equals: A Max positive force vs r B. Max negative force vs r C. zero force vs r D. Minimum force at r = infinity (infinity)

Solution

The answer is (C) Zero force vs r.

This is because as the seperation between the atoms becomes small, the electron clouds of the two atoms starts overlapping the repulsion between the two atoms become significant and then the two atoms settle at a seperation where the sum of the attractive and repulsive forces becomes zero. This seperation is called quilibrium seperation. They form a diatomic molecule.