The size of isoelectronic species $-\mathrm{F}^{-}$, Ne and $\mathrm{Na}^{+}$is affected by (a) nuclear charge (Z) (b) valence principal quantum number (n) (c) electron-electron interaction in the outer orbitals (d) none of the factors because their size is the same.

Question

The size of isoelectronic species $-\mathrm{F}^{-}$, Ne and $\mathrm{Na}^{+}$is affected by (a) nuclear charge (Z) (b) valence principal quantum number (n) (c) electron-electron interaction in the outer orbitals (d) none of the factors because their size is the same.,

MARKS App · Accepted Answer

The size of the isoelectronic ions depends upon the nuclear charge $(Z)$. As the nuclear charge increases the size decreases. For example, $\mathrm{F}^{-}(+9)>\mathrm{Ne}(+10)>\mathrm{Na}^{+}(+11)$. Therefore, statement (a) is correct while all other statements are wrong.

Search any question & find its solution

Looking for more such questions to practice?