Describe Magnetic Properties of D-Block Elements - QS Study
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The magnetic properties of a D-Block Elements are determined by the number of unpaired electrons in it. There are two main type of substances.

(i) Paramagnetic substances

The paramagnetic character arises because of the presence of unpaired electrons. Paramagnetic substances are the substances which are attracted by magnetic field.

(ii) Diamagnetic Substances

Diamagnetic character arises because of the absence of unpaired electrons. Diamagnetic substance are the substances which are repelled by the magnetic field.

Most of the transition elements and their compounds are paramagnetic and are attracted by magnetic field. Greater the number of unpaired electrons in the substance greater is the paramagnetic character, The magnetic character of a substance is expressed in terms of magnetic moments. The magnetic moment can be calculated using the relation

μ = √{n(n + 2)} BM (BohrMagneton)

n = number of unpaired electrons

Example

Ti3+ – The number of unpaired electrons is 1. Hence

μ = √{1(1+ 2)} BM = 3 = 1.732 B.M

Larger the value of magnetic moment, the greater is the paramagnetic character.

In addition to paramagnetic and diamagnetic substance, there are a few substances such as iron which are highly magnetic as compared to ordinary metals.

These substances are called ferromagnetic substances.