# Among the following ions, which are has the highest paramagnetism?

$\left[Cr\left({H}_{2}O{\right)}_{6}{\right]}^{+3}$

$\left[Fe\left({H}_{2}O{\right)}_{6}{\right]}^{+2}$

$\left[Cu\left({H}_{2}O{\right)}_{6}{\right]}^{+2}$

$\left[Zn\left({H}_{2}O{\right)}_{6}{\right]}^{+2}$

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