We room being asked if the types is paramagnetic or diamagnetic so we have to determine theelectron construction ofCa2+ ion.

You are watching: How many unpaired electrons does calcium have

Recall that paramagnetic species have 1 or an ext unpaired electrons when diamagneticcontains0 unpaired electron.

To figure that out, let’s very first write theelectron construction of a neutral (uncharged) Ca atom.

Ground-state means that Calcium is in its shortest energy form (not in one excited state).

Neutral element: atomic number = # protons = # that electrons

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Neutral Calcium (Ca):

• atomic number = 20• # of electrons = 20 e-


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Problem Details

Is the complying with ion diamagnetic or paramagnetic?

Ca2+


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