In which pair first element has more Z_ eff than second atom ? - Vidyadip

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
$Z_{eff}$

$_{8} \mathrm{O}=3.9$

$_{9} \mathrm{F}=4.55$

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