Number of molecules/species from the following having one unpaired electron is

Question

Canvas Classes · Accepted Answer

Step 1 — MO electron configurations and unpaired electrons:

(16e⁻):  → 2 unpaired electrons (paramagnetic) — NOT 1 unpaired

(17e⁻):  → 1 unpaired electron ✓

NO (11e⁻):  → 1 unpaired electron ✓

(14e⁻): Isoelectronic with  → all electrons paired → 0 unpaired

(18e⁻):  → all paired → 0 unpaired

Step 2:  and NO → 2 species

Answer: 2

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