Determine the Maximum Wavelength of Incident Radiation That Can Be

Multiple Choice

Determine the maximum wavelength of incident radiation that can be used to remove the remaining electron from a singly ionized helium atom He⁺ (Z = 2) . Assume the electron is in its ground state.

A) 6.2 nm
B) 12.4 nm
C) 22.8 nm
D) 45.6 nm
E) 54.4 nm