Question
Incorrect order of ionic size is
✓
Answer
a
$(a)$ Correct order : $La^{3+} > Gd^{3+} > Eu^{3+} > Lu^{3+}$
$(a)$ Correct order : $La^{3+} > Gd^{3+} > Eu^{3+} > Lu^{3+}$
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