MCQ
From the following pairs of ions which one is not an iso-electronic pair?
- A$\mathrm{O}^{2-}, \mathrm{F}^{-}$
- B$\mathrm{Na}^{+}, \mathrm{Mg}^{2+}$
- C$\mathrm{Mn}^{2+}, \mathrm{Fe}^{3+}$
- ✓$\mathrm{Fe}^{2+}, \mathrm{Mn}^{2+}$
✓
Answer
Correct option: D.
$\mathrm{Fe}^{2+}, \mathrm{Mn}^{2+}$
d
Not isoelectronic
Not isoelectronic
$\mathrm{Fe}^{+2}$
$\downarrow$
$24 \mathrm{e}^{-}$
$\mathrm{Mn}^{+2}$
$\downarrow$
$23 \mathrm{e}^{-}$
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