Chapter 9.3, Problem 1CP

Which of the following atoms, in its ground state, does not have unpaired electrons? (Select all that apply.)

$\begin{array}{l}\text{a)}\hfill \\ \text{O}\hfill \\ \text{b)}\hfill \\ \text{Be}\hfill \\ \text{c)}\hfill \\ \text{B}\hfill \\ \text{d)}\hfill \\ \text{F}\hfill \\ \text{e)}\hfill \\ \text{Ne}\hfill \\ \hfill \end{array}$