Question

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Potential En Internuclear Distance The potential energy of a system of two atoms as a function of their intenuclear distance is shown in the diagram above. Which of the following is true regarding the forces between the stoms when their internuclear distances A The attractive and repulsive forces are balanced, so the storms will maintain an average internuclear distance B There is a true force pushing the moms apart so the woms will move further part C) There is an active force puling the atoms together, so the atoms will move closer together (D) it cannot be determine whether the forces between atoms are balanced, attractive, or repulsive, because the diagram shows only the potential energy

Answer 1

Ans. When two atoms come close to each other to form bond (eg. one hydrogen atom and other is chlorine atom) then they will feel stron attractive forces due to opposite charge.The internuclear distance will decrease and the potential energy decrease.But there is a limit upto which they come close to each other .At this point the attractive force is balanced by the repulsive forces.If we try to make them come more closer than repulsive force will dominates and again the potential energy will increase.So x is the point where the stability is maximum and the bond is formed and the distance between the two atoms is called as internuclear distance..

Hence option (A) is the correct one...

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