12) When two atoms approach
each other and a bond is formed,
potential energy
a. Increases
b. Decreases
c. Sometimes increases, sometimes
decreases
d. None of the above
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Answer: increases.
Explanation:
The strong attraction of each shared electron to both nuclei stabilizes the system, and the potential energy decreases as the bond distance decreases. If the atoms continue to approach each other, the positive charges in the two nuclei begin to repel each other, and the potential energy increases.
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