Question

Which of the following sets of ions contain only paramagnetic ions
a. Sm3+, H03+, Lu3+
b. La3+, Ce3+, Sm3+
c. La3+, Eu3+, Gd3+
d. Ce3+, Eu3+, Yb3+
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Answer 1

Answer:

a

Explanation:

hope it helps you friend

Answer 2

Option D is correct

Ce3+ , Eu3+, Yb3+

Explanation:

Let us first understand the meaning of paramagnetic ions

Paramagnetism shows the behaviour of any element have  unpaired electrons in its valance shell. And the ions which follow this behaviour are known as paramagnetic ions .

As we can see that

• The electronic configuration of Ce3+ is 1s² 2s² 2p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹ shows that the electron in f shell in unpaired .

• The electronic configuration of [Xe]4f6. shows an unpaired e- in outer most shell.

• Similarly  in Yb3+ which have electronic configuration as 4f135s25p6

        shows an unpaired e- in valance shell.

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