The size of isoelectronic species `-F^(-) ,Ne ` and `Na^(+) ` is affected by
( a) nuclear charge ( Z) ( b) valence principal quantum number (n)
(c ) electron- electron interaction in the outher orbital
( d) none of the factors bacause their size is the same .

Explanation

To determine how the size of isoelectronic species \( F^- \), \( Ne \), and \( Na^+ \) is affected, we need to analyze the factors influencing atomic size.

### Step-by-Step Solution:

1. **Identify the Isoelectronic Species**:
- The species in question are \( F^- \), \( Ne \), and \( Na^+ \).
- All three species have the same number of electrons, which is 10 electrons.

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