MCQ
In which of the following pair, both the species are isoelectronic but the first one is large in size than the second?
- A$S^{2-} , O^{2-}$
- B$Cl^- , S^{2-}$
- ✓$F^- ,Na^+$
- D$N^{3-} , P^{3-}$
✓
Answer
Correct option: C.
$F^- ,Na^+$
c
$N a^{+}$ and $F^{-}$ are isoelectronic species with 10 electrons each. For isoelectronic species, cation has smaller size than anion. In $N a^{+}, 11$ protons attract 10 electrons. In $F^{-}, 9$ protons attract 10 electrons. Hence the attraction between nucleus and valence electrons is more for $N a^{+}$ than $F^{-}$.
$N a^{+}$ and $F^{-}$ are isoelectronic species with 10 electrons each. For isoelectronic species, cation has smaller size than anion. In $N a^{+}, 11$ protons attract 10 electrons. In $F^{-}, 9$ protons attract 10 electrons. Hence the attraction between nucleus and valence electrons is more for $N a^{+}$ than $F^{-}$.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which of the following molecule contains both ionic and covalent bond
Calculate the $pH$ at the equivalence point in the titration of $25\ mL$ of $0.01\ M$ formicacid with a $0.1\ M$ $NaOH$ solution (giyenthat $pK_a$ of formic acid $= 3.74$) . $[log\,2 = 0.30]$
→The product obtained, heating ethanol with conc. ${H_2}S{O_4}$ at ${165^o} - {170^o}$, is
→Which of the following statements does not form part of Bohr's model of the hydrogen atom
In $\left[ {Cu\,{{\left( {N{H_3}} \right)}_4}} \right]\,S{O_4},\,\,;\,Cu$ has following hybridization
→Which of the following process is non-spontaneous?
Which of the following is solid at room temperature?
The number of shared pairs of electrons in propane is
Reagent $(A)$ in the reaction is
→$MMPP \to$ Magnesium mono peroxy phthalate. Product $(X)$ is
→