Question

why zinc metal and zn2+ ions are dimanetic​

Answer 1

Answer:

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ur ans..-

In +2 state of Zn, Zn(30) becomes Zn(28) i.e. electronic configuration is [Ar]3d104s0 , so here 2 electron is out from 4s-orbital , which results in no unpairing of electron i.e. in +2 state also Zn has all electrons paired, so it is diamagnetic .

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Answer 2

Answer: Diamagnetic means the orbitals are fully paired ie. have paired electron and no unpaired electron. So in Zn whose electronic configuration is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 so here the d orbital is fully paired and no unpaired electron is present.

Similarly Zn2+ looses 2 electrons from the 4s orbital so again you will get fully filled 3d orbital and no unpaired electrons.. Hence Zn and Zn2+ are Diamagnetic..

You can also draw their MOT structure to clarify your question..