1.

Which is not correct statement about the chemistry of 3d and 4f series elements ?

Answer»

3d-elements show more oxidation statesthan 4f-series elements ?
The ENERGY difference between 3d and 4S orbitals is very little
Europium (II) is more stable than Ce(II)
The PARAMAGNETIC character in 3d -series elements increases from scandium to copper.

Solution :The paramagnetic character is 3d series elements FIRST increases from Sc to Mn as the number of unpaired electrons increases and then decreases as the number of unpaired electrons decreases from Fe to Cu.


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