MCQ
$IP$ values of $\text{Sc, Y}$ and $La$ are in the order:
- ✓$\text{Sc > Y > La}$
- B$\text{Sc < Y < La}$
- C$\text{Sc = Y = La}$
- D$\text{La > Sc > Y}$
✓
Answer
Correct option: A.
$\text{Sc > Y > La}$
$IP$ values of $\text{Sc, Y}$ and $La$ are in the order $\text{Sc > Y > La}$ On moving down the group, the $IP$ values decreases as the effective nuclear charge decreases due to poor shielding by inner electrons.
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