The number of molecules or ions from the following which do not have an odd number of electrons are

(A) (B) (C) (D) (E) (F) NO

Question

The number of molecules or ions from the following which do not have an odd number of electrons are

(A)  (B)  (C)  (D)  (E)  (F) NO

Canvas Classes · Accepted Answer

🧠 Count total valence electrons for each species (including the ionic charge adjustment). Molecules with an even electron count cannot have an odd number of electrons.

| Species | Electron count | Odd? | NOT odd? |
|---|---|---|---|
|  |  | odd | ✗ |
|  |  | even | ✓ |
|  |  | even | ✓ |
|  |  | odd | ✗ |
|  |  | even | ✓ |
| NO |  | odd | ✗ |

Species with not an odd number of electrons: , ,  → 3 species.

⚡ Shortcut: only molecules with even total valence electrons can satisfy the octet full

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