For transition elements,which of the following occurs as the effective nuclear charge increases?
A)The atomic radius increases.
B)The density increases.
C)Both the atomic radius and the density increase.
D)The atomic radius decreases and the density increases.

Question

Quizplus · Accepted Answer

As the effective nuclear charge increases, the attraction between the nucleus and the valence electrons strengthens, causing the atomic radius to decrease. At the same time, the addition of electrons to the d orbitals and the increased nuclear charge lead to an increase in electron density within the atom, resulting in an increase in density. Therefore, the correct choice is D, in which the atomic radius decreases and the density increases.

For Transition Elements,which of the Following Occurs as the Effective