Why are two balls connected by a spring a good model for two atoms connected by

Question

Why are two balls connected by a spring a good model for two atoms connected by a chemical bond?

A) The magnitude of the force one atom exerts on another is proportional to the stretch or compression of the bond between them.

B) If the two atoms get farther apart than the equilibrium interatomic distance, they attract each other.

C) Each spring represents a real microscopic coiled metal wire that connects two adjacent atoms.

D) If the two atoms get closer together than the equilibrium interatomic distance, they repel each other.

Note: I already tried A B C and A B and A D and none of these combinations are correct.

Explanation / Answer

If two atoms get close to each other or farther apart from their equillibrium distance , chemical bond ( spring like nature) kicks and tries to regain their original position.

So if two atoms gets farther apart than the equllibrium interatomic distance ,they attract each other (B) .

similarly If two atoms get closer together than their equllibrium distance ,they repel each other. (D)

Their is no spring or any other device that connect two atoms. So option C is wrong.

The stretching or compression of a spring,sets up restoring force ( the force by which a object tries to regain its original positon,and it is opposite to applied force) ,which is proportional to stretch or compression of bond between them.

So correct ans is ABD.

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