9. Which of the following statement is incorrect? (A) Across a period from Sc to Cu, the densities increase with
increasing atomic number
(B) The noble character of transitions metals is due to high
ionization energies, high enthalpies of solvation and higher
thalpies of sublimation
(C) on going down a group from 3d to 6d series, the stability
of higher oxidation state increases with stability of high
oxidation state increases with increasing atomic numbers
​