APFIVE Potential Energy Well and Atomic Radius
A scientist observes that as atomic size increases down Group 17, the depth of the potential energy well for diatomic molecules (X₂) decreases. Which quantitative relationship best explains this trend?
A
PE ∝ r², as r increases, bond strength increases
B
PE ∝ 1/r, as r increases, orbital overlap decreases
C
PE ∝ 1/r², as r increases, nuclear attraction increases
D
PE ∝ r, as r increases, electron density increases
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