Chapter 6.9, Problem 3CP

Which of the following is a d-block element? (Select all that apply.)

$\begin{array}{l}\text{a)}\hfill \\ \text{Sb}\hfill \\ \begin{array}{l}\text{b) }\\ \text{Au}\end{array}\hfill \\ \text{c)}\hfill \\ \text{Ca}\hfill \\ \text{d)}\hfill \\ \begin{array}{l}\text{Zn}\\ \text{e)}\\ \text{U}\end{array}\hfill \\ \hfill \end{array}$