MCQ
Which of the following elements has the highest ionization energy?
- A$\ce{Al}$
- B$\ce{In}$
- C$\ce{Ga}$
- ✓$\ce{B}$
✓
Answer
Correct option: D.
$\ce{B}$
In the fifth group, ionization potential $\ce{(I.E)}$ decreases on moving down the group from top to bottom.
Therefore, boron $\ce{(B)}$ has the highest $\ce{I.E}.$
Therefore, boron $\ce{(B)}$ has the highest $\ce{I.E}.$
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