The lanthanoid contraction causes the radii of the third transition series elements to be very similar to those of the corresponding second series elements. The nearly identical radii of Zr (160 pm) and Hf (159 pm), resulting from the lanthanoid ...
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Manganate and permanganate ions adopt tetrahedral geometry, with p-bonding occurring through the overlap of p orbitals of oxygen with d orbitals of manganese. The paramagnetism of green manganate arises from one unpaired electron, while permanganate is diamagnetic due to the ...
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