In which pair of ions are both diamagnetic in | vedclass

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(B) species is diamagnetic if it has no unpaired electrons.$1$. $Fe^{+2}$ $([Ar] 3d^6)$ has $4$ unpaired electrons; $Fe^{+3}$ $([Ar] 3d^5)$ has $5$ un

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$Hg_2^{+2}, Hg^{+2}$

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(B) species is diamagnetic if it has no unpaired electrons.$1$. $Fe^{+2}$ $([Ar] 3d^6)$ has $4$ unpaired electrons; $Fe^{+3}$ $([Ar] 3d^5)$ has $5$ unpaired electrons.$2$. $Hg_2^{+2}$ contains two $Hg^{+}$ ions $([Xe] 4f^{14} 5d^{10} 6s^1)$ bonded together,resulting in a paired electron configuration $([Xe] 4f^{14} 5d^{10} 6s^0)$,making it diamagnetic. $Hg^{+2}$ $([Xe] 4f^{14} 5d^{10})$ has a completely filled $d$-orbital,making it diamagnetic.$3$. $Cu^{+}$ $([Ar] 3d^{10})$ is diamagnetic,but $Cu^{+2}$ $([Ar] 3d^9)$ has $1$ unpaired electron.Therefore,the pair $Hg_2^{+2}, Hg^{+2}$ is diamagnetic.

In which pair of ions are both diamagnetic in nature?

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