An electron in a hydrogen atom jumps from n = 5 to n = 2.The color of the photon given off is
A)purple.
B)blue.
C)green.
D)red.
E)The photon is outside the visible range.

Question

Quizplus · Accepted Answer

When an electron jumps from a higher energy level to a lower energy level, a photon is emitted. The energy of the photon is equal to the difference in energy between the two levels. In this case, the electron is dropping from level 5 to level 2, which is a relatively large energy difference, resulting in a photon with a high energy and short wavelength. This corresponds to the blue end of the visible spectrum, making choice B the correct answer.

An Electron in a Hydrogen Atom Jumps from N =