MCQ
The correct sequence of elements in decreasing order of first ionisation energy is
- A$Na > Mg > Al$
- B$Mg > Na > Al$
- C$Al > Mg > Na$
- ✓$Mg > Al > Na$
✓
Answer
Correct option: D.
$Mg > Al > Na$
d
(d) $Mg > Al > Na$. This is due to the presence of fully filled $s-$orbital in $Mg.$
(d) $Mg > Al > Na$. This is due to the presence of fully filled $s-$orbital in $Mg.$
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