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

Options

A. 3d elements show more oxidaiton states than 4f series elements
B. The energy difference between 3d and 4s orbitals is very little
C. Europium (II) is more stable than Ce(II)
D. The paramagnetic character in 3d series elements increases from scandium to copper

Answer

D

Explanation

Elements having unpaired electrons in their outermost orbit, are termed as paramagnetic. In 3d series elements, no. of unpaired electron increases from Sc to Mn and then decreases from Fe to Zn.
Therefore, paramagnetic character increases from Sc to Mn and then decreases from Fe to Zn.