Which of the following ion is diamagnetic?

^{+ 2}

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^{+ 3}

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^{+ 3}

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^{+ 2}

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Solution

The correct option is A Zn $^{+ 2}$
Ions are diamagnetic if all the electrons are paired in their electronic configuration.
Electronic configuration:
$Z n^{2 +}$ = $[A r] 3 d^{10}$
All electrons are paired hence $Z n^{2 +}$ is diamagnetic.

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