Passage VII

According to a simplified model of the hydrogen atom, an electron orbits a proton located at the center of the atom. The electron can exist only in certain orbits, each with a specific radius. When the electron jumps from one orbit to another orbit of smaller radius, the atom emits a packet of energy known as a photon.

The electron jumps shown in Figure 1, which involve the first 6 orbits, result in the emission of 3 types of photons—ultraviolet, visible, and infrared. The energies and wavelengths of the photons emitted due to these jumps are shown in Table 1.

(Note: Diagram is not drawn to scale.)

Figure adapted from Edwin R. Jones and Richard L. Childers, Contemporary College Physics. ©1993 by Addison-Wesley Publishing Company, Inc.

37. When a hydrogen atom absorbs energy, the electron can jump from one orbit to another orbit of larger radius. Suppose the electron has jumped from Orbit 1 to Orbit 5 due to the absorption of the energy of a single photon. Based on Figure 1, it is most likely that the atom absorbed:

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation

According to figure 1, the transition from Orbit 5 to Orbit 1 emits ultraviolet photon, so the transition from Orbit 1 to Orbit 5 also needs to absorb ultraviolet photon to have enough energy to complete the transition, so choose A