Question
Question: Which of the following lanthanide ion is paramagnetic?...
Which of the following lanthanide ion is paramagnetic?
A
Ce4+
B
Yb2+
C
Lu3+
D
Eu2+
Answer
Eu2+
Explanation
Solution
Ce→[Xe]4f15d16s2; Ce4+→[Xe]
Yb→[Xe]4f146s2; Yb2+→[Xe]4f14
Lu→[Xe]4f145d16s2; Lu3+→[Xe]4f14Eu→[Xe]4f76s2; Eu2+→[Xe]4f7