Question 1
Which choice lists two elements with ground-state electron configurations that are well known exceptions to the Aufbau principle?
◦ Cu and C
◦ Cr and Cu
◦ Cs and Cl
◦ Rb and Co
◦ Fe and Co
Question 2
Which element has the following ground-state electron configuration?
[Xe]6s
24f
145d
4◦ W
◦ Pm
◦ Mo
◦ Np
◦ Re