The energy required to ionize hydrogen when the electron is in the second level is _______ the energy required to ionize hydrogen when electron is in the first level.
A)twice
B)half of
C)four times
D)one fourth of
E)equal to

Question

Quizplus · Accepted Answer

The energy required to ionize an electron from a hydrogen atom is inversely proportional to the square of the principal quantum number (n). For n=1, the energy is 13.6 eV, and for n=2, it is 13.6/4 = 3.4 eV, which is one fourth of the energy required for n=1.

The Energy Required to Ionize Hydrogen When the Electron Is