Consider a Beryllium Z = 4) Ion with All but One

Multiple Choice

Consider a beryllium z = 4) ion with all but one of its electrons removed. What is the kinetic energy of the electron in the n = 1 orbit. The radius of the first Bohr orbit in Be³⁺ is 0.0132 nm.)

A) 54.4 eV
B) 218 eV
C) 13.6 eV
D) 27.2 eV
E) 109 eV