Question

During the formation of a chemical bond:

A

electron-electron repulsion becomes more than the nucleus-electron attraction

B

energy of the system does not change

C

energy increases

D

energy decreases

Medium

Solution

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Correct option is D)

When a bond forms, electrons are attracted to the space between nuclei where the electrostatic force of attraction is greater.  As the electrons fall to a position of lower potential energy, the total mechanical energy of the molecular system decreases.  

Hence, option D is correct.

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