D-And F-Block Elements Ques 475
Question: Which of the following statement is incorrect-
Options:
A) Across a period from Sc to Cu the densities increase with increasing atomic number.
B) The melting point of transition elements rise to a maximum from Sc to Cr and then decreases from Fe to Zn.
C) Transition elements have high enthalpies of atomization and in 3d series increase regularly from Sc to Cu.
D) On going down a group from 3d to 6d series the stability of higher oxidation state increases with increasing atomic number.
Show Answer
Answer:
Correct Answer: C
Solution:
[a], [b] and [d] are correct statements. [c] There is drop in enthalpy of atomization at manganese because of half-filled stable electronic configuration leading to less mobilisation of electrons. This results in weaker metallic bonds.
