The size of isoelectronic species `F^(ɵ)`, `Ne`, and `Na^(o+)` is affected by

Options

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.

Explanation

The size of an isoelectronic species increases with a decrease in the nuclear charge (Z). For example, the order of the increasing nuclear charge of `F^(-)`, Ne, and `Na^(+)` is as follows:
`F^(-) lt Ne lt Na^(+)`
`Z " " 9" " 10" "11`
Therefore, the order of the increasing size of `F^(-)`, Ne and `Na^(+)` is as follows:
`Na^(+) lt Ne lt F^(-)`