1. Tardigrade
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  3. Chemistry
  4. Which of the following ions are paramagnetic in character?

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Q. Which of the following ions are paramagnetic in character?

Classification of Elements and Periodicity in Properties

Solution:

$Zn ^{2+}:[ Ar ]^{18} 3 d ^{10} ; Ag ^{+}:[ Kr ]^{36} 4 d ^{10}$

$Cu ^{+}:[ Ar ]^{18} 3 d ^{10} ; Ni ^{2+}:[ Ar ]^{18} 3 d ^{8}$

As such $Ni^{2+} $ has two unpaired electrons and is paramagnetic.