Ion–ion Coulomb interaction (Born-style) (Attraction energy scales as −(charge product)/distance (vacuum proportionality))
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Attraction energy scales as −(charge product)/distance (vacuum proportionality)
What each symbol means
| Symbol | What it stands for |
|---|---|
| r | Center-to-center distance between ions |
| z_+ z_- | Charge product (opposite signs → attractive interaction) |
When to use this
Explains magnitude trends alongside lattice models; qualitative for JEE.