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# Explain Giving Reasons: Transition Metals and Many of Their Compounds Show Paramagnetic Behaviour. - CBSE (Science) Class 12 - Chemistry

ConceptGeneral Properties of the Transition Elements (D-block)

#### Question

Explain giving reasons:

Transition metals and many of their compounds show paramagnetic behaviour.

#### Solution 1

Transition metals show paramagnetic behaviour. Paramagnetism arises due to the presence of unpaired electrons with each electron having a magnetic moment associated with its spin angular momentum and orbital angular momentum. However, in the first transition series, the orbital angular momentum is quenched. Therefore, the resulting paramagnetism is only because of the unpaired electron.

#### Solution 2

Transition elements and many of their compounds are paramagnetic, i.e., they are weakly attracted by a magnetic field. This is due to the presence of unpaired electrons in atoms, ions or molecules. The paramagnetic character increases as the number of . unpaired electrons increases. The paramagnetic character is measured in terms of magnetic moment and is given by mu = sqrt(n(n+2)) where n – number of unpaired electrons.

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#### APPEARS IN

NCERT Solution for Chemistry Textbook for Class 12 (2018 to Current)
Chapter 8: The d-block and f-block Elements
Q: 11.1 | Page no. 234

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Solution Explain Giving Reasons: Transition Metals and Many of Their Compounds Show Paramagnetic Behaviour. Concept: General Properties of the Transition Elements (D-block).
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