Arrange the bonds in order of increasing ionic character in the molecules: and

Question

Arrange the bonds in order of increasing ionic character in the molecules:  and

Canvas Classes · Accepted Answer

Ionic character increases with greater electronegativity difference between bonded atoms.

Step 1 — Electronegativity differences (Δχ):

| Compound | Bond | Δχ | Character |
|----------|------|----|-----------|
|  | N–N | 0 | Purely covalent |
|  | S–O | ~1.0 | Polar covalent |
|  | Cl–F | ~1.0 | Polar covalent |
|  | K–O | ~2.7 | Highly ionic |
|  | Li–F | ~3.0 | Most ionic |

Step 2 — Between  and :
- S–O Δχ ≈ 1.0; Cl–F Δχ ≈ 1.0 but F is more electronegative
-  <  in ionic character (S–O bond

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