Calculate spin only magnetic moment of given ions
(i) `Cu^(2+)`
(ii) `Cr^(2+)`
(iii) ` Fe^(3+)`
(iv) `Ni^(2+)`

Explanation

To calculate the spin-only magnetic moment of the given ions, we will use the formula:

\[ \mu = \sqrt{n(n + 2)} \]

where \( \mu \) is the magnetic moment in Bohr magnetons (BM) and \( n \) is the number of unpaired electrons in the ion.

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