MCQ
Which of the following has least ionization potential
- A$Li$
- ✓$Cs$
- C$Cl$
- D$I$
✓
Answer
Correct option: B.
$Cs$
b
(b) $Li$ and ${A_2}{B_3}$ belong to Ist group but $Cs$ has larger size, hence low nuclear attraction force, thus low ionization energy.
(b) $Li$ and ${A_2}{B_3}$ belong to Ist group but $Cs$ has larger size, hence low nuclear attraction force, thus low ionization energy.
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