MCQ
Which among the following elements have lowest value of $I{E_1}$
- A$Pb$
- ✓$Sn$
- C$Si$
- D$C$
✓
Answer
Correct option: B.
$Sn$
b
(b) The ionisation energy of tin {$Sn$} is less than that of lead ($Pb$).
(b) The ionisation energy of tin {$Sn$} is less than that of lead ($Pb$).
It is due to the poor shielding of $d$- and $f-$electron in $Pb$ due to which it feels greater attraction from nucleus.
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