8. Which of the following statements is correct?
(A) Argon has ionization energy higher than bromine.
(B)Among Na-, Na, and Na+, Na- has the smallest radius.
(C) For Rb, Na, and Be, the order of increasing atomic size is Rb < Na < Be.
(D) In the ground state of mercury, Hg, its electron configuration is 1s22s2 2p63s23p64s23d104p65s24d10.
(E)In the ground state of element 115, Uup, it has 24 electrons occupying atomic orbitals with l = 3.