Question

The size of isoelectronic species; $F^{-},Ne,{Na}^{+}$ is affected by:

• A. nuclear charge $\left(Z\right)$
• B. valence principal quantum number $\left(n\right)$
• C. electron-electron interaction in the outer orbitals
• D. none of the factors because their size is the same

Answer 1

The correct option is A nuclear charge $\left(Z\right)$

The size of isoelectronic species $F^{-}$, $Ne$ and ${Na}^{+}$ affected by nuclear charge $\left(Z_{eff}\right)$. With increase in nuclear charge (atomic number), the size of the isoelectronic species decreases.

Hence, option $A$ is correct.