MCQ
In which pair first element has more $Z_{eff}$ than second atom ?
- A$Be, B$
- B$C, N$
- C$Na, K$
- ✓$F, O$
✓
Answer
Correct option: D.
$F, O$
d
$Z_{eff}$
$Z_{eff}$
$_{8} \mathrm{O}=3.9$
$_{9} \mathrm{F}=4.55$
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