Pauling Electronegativity Difference (Absolute EN difference gauges bond polarity; larger delta means more polar covalent /)
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Absolute EN difference gauges bond polarity; larger delta means more polar covalent / ionic character
What each symbol means
| Symbol | What it stands for |
|---|---|
| \Delta \chi | Difference used in polarity estimates |
| \chi_A,\chi_B | Pauling electronegativities of atoms A and B |
When to use this
Pauling scale dimensionless (relative). Δχ ≳ 1.7–2.0 often cited as ionic/covalent boundary in older rules — JEE may give their own threshold.