Ncert Exercises & Solutions

The magnetic nature of elements depends on the presence of unpaired electrons. Identify the configuration of the transition element, which shows the highest magnetic moment.

$1 . 3 d^{7}$
$2 . 3 d^{5}$
$3 . 3 d^{8}$
$4 . 3 d^{2}$

The greater the number of the unpaired electrons, the higher will be its value of the magnetic moment. Since 3

d^{5}

has 5 unpaired electrons hence the highest magnetic moment.

μ = \sqrt{5 (5 + 2)}

= \sqrt{35}

= 5.95 B M

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